Repository: conda/conda

Issue:
`conda update --all` wants to downgrade from conda-canary (and then things go haywire)
I just did the following to try out conda-canary:

```
>conda config --add channels conda-canary
>conda update conda
...
The following packages will be UPDATED:

    conda: 4.1.9-py35_0 --> 4.2.1-py35_0 conda-canary

Proceed ([y]/n)? y
...
```

I then thought I might update all the packages, and conda wants to downgrade itself:

```
>conda update --all
Fetching package metadata .........
Solving package specifications: ..........

Package plan for installation in environment C:\Anaconda3:

The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    cython-0.24.1              |           py35_0         2.2 MB
    llvmlite-0.12.1            |           py35_0         5.8 MB
    lxml-3.6.1                 |           py35_0         1.6 MB
    pytz-2016.6.1              |           py35_0         171 KB
    pyzmq-15.3.0               |           py35_0         551 KB
    ruamel_yaml-0.11.14        |           py35_0         217 KB
    sip-4.18                   |           py35_0         241 KB
    tornado-4.4.1              |           py35_0         595 KB
    wcwidth-0.1.7              |           py35_0          21 KB
    win_unicode_console-0.5    |           py35_0          27 KB
    conda-4.1.11               |           py35_0         247 KB
    numba-0.27.0               |      np111py35_0         1.9 MB
    numexpr-2.6.1              |      np111py35_0         142 KB
    pickleshare-0.7.3          |           py35_0           8 KB
    prompt_toolkit-1.0.3       |           py35_0         308 KB
    qt-4.8.7                   |           vc14_9        50.5 MB
    traitlets-4.2.2            |           py35_0         113 KB
    anaconda-client-1.5.1      |           py35_0         166 KB
    bokeh-0.12.1               |           py35_0         3.3 MB
    conda-build-1.21.9         |           py35_0         319 KB
    ipython-5.0.0              |           py35_0         1.0 MB
    pyqt-4.11.4                |           py35_7         3.8 MB
    pyopenssl-16.0.0           |           py35_0          68 KB
    jupyter_console-5.0.0      |           py35_0          69 KB
    ------------------------------------------------------------
                                           Total:        73.2 MB

The following packages will be UPDATED:

    anaconda-client:     1.4.0-py35_0                    --> 1.5.1-py35_0
    bokeh:               0.12.0-py35_0                   --> 0.12.1-py35_0
    conda-build:         1.21.6-py35_0                   --> 1.21.9-py35_0
    cython:              0.24-py35_0                     --> 0.24.1-py35_0
    ipython:             4.2.0-py35_0                    --> 5.0.0-py35_0
    jupyter_console:     4.1.1-py35_0                    --> 5.0.0-py35_0
    llvmlite:            0.11.0-py35_0                   --> 0.12.1-py35_0
    lxml:                3.6.0-py35_0                    --> 3.6.1-py35_0
    numba:               0.26.0-np111py35_0              --> 0.27.0-np111py35_0
    numexpr:             2.6.0-np111py35_0               --> 2.6.1-np111py35_0
    pickleshare:         0.7.2-py35_0                    --> 0.7.3-py35_0
    prompt_toolkit:      1.0.0-py35_0       xonsh        --> 1.0.3-py35_0
    pyopenssl:           0.16.0-py35_0                   --> 16.0.0-py35_0
    pyqt:                4.11.4-py35_6                   --> 4.11.4-py35_7
    pytz:                2016.4-py35_0                   --> 2016.6.1-py35_0
    pyzmq:               15.2.0-py35_0                   --> 15.3.0-py35_0
    qt:                  4.8.7-vc14_8                    [vc14] --> 4.8.7-vc14_9       [vc14]
    ruamel_yaml:         0.11.7-py35_0                   --> 0.11.14-py35_0
    sip:                 4.16.9-py35_2                   --> 4.18-py35_0
    tornado:             4.3-py35_1                      --> 4.4.1-py35_0
    traitlets:           4.2.1-py35_0                    --> 4.2.2-py35_0
    wcwidth:             0.1.5-py35_5       xonsh        --> 0.1.7-py35_0
    win_unicode_console: 0.4-py35_0         xonsh        --> 0.5-py35_0

The following packages will be SUPERCEDED by a higher-priority channel:

    conda:               4.2.1-py35_0       conda-canary --> 4.1.11-py35_0

Proceed ([y]/n)? n
```

I'm not sure why upgrading via `conda update conda` would produce a different result for the package than `conda update --all`, intuitively the latter feels like it's a superset of the former, and the channel priority logic should apply the same way to both.

To check that there's no conflict between conda-canary and something else interfering with the `--all` case, I next proceeded with the update, then did `conda update conda` again. It goes haywire at this point:

```
... lots of printout that scrolled out of range ...
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMPrint\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMPrint\.svn\prop-base\DOMPrint.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMPrint\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMPrint\.svn\text-base\DOMPrint.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMPrint\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMPrint\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMPrint
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTest\.svn\prop-base\DOMTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTest\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTest\.svn\text-base\DOMTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTest\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTest\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTest
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTraversalTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTraversalTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTraversalTest\.svn\prop-base\DOMTraversalTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTraversalTest\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTraversalTest\.svn\text-base\DOMTraversalTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTraversalTest\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTraversalTest\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTraversalTest
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTypeInfoTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTypeInfoTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTypeInfoTest\.svn\prop-base\DOMTypeInfoTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTypeInfoTest\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTypeInfoTest\.svn\text-base\DOMTypeInfoTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTypeInfoTest\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTypeInfoTest\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\DOMTypeInfoTest
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EncodingTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EncodingTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EncodingTest\.svn\prop-base\EncodingTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EncodingTest\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EncodingTest\.svn\text-base\EncodingTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EncodingTest\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EncodingTest\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EncodingTest
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EnumVal\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EnumVal\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EnumVal\.svn\prop-base\EnumVal.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EnumVal\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EnumVal\.svn\text-base\EnumVal.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EnumVal\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EnumVal\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\EnumVal
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\InitTermTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\InitTermTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\InitTermTest\.svn\prop-base\InitTermTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\InitTermTest\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\InitTermTest\.svn\text-base\InitTermTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\InitTermTest\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\InitTermTest\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\InitTermTest
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemHandlerTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemHandlerTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemHandlerTest\.svn\prop-base\MemHandlerTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemHandlerTest\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemHandlerTest\.svn\text-base\MemHandlerTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemHandlerTest\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemHandlerTest\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemHandlerTest
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemParse\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemParse\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemParse\.svn\prop-base\MemParse.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemParse\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemParse\.svn\text-base\MemParse.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemParse\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemParse\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\MemParse
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PParse\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PParse\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PParse\.svn\prop-base\PParse.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PParse\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PParse\.svn\text-base\PParse.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PParse\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PParse\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PParse
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PSVIWriter\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PSVIWriter\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PSVIWriter\.svn\prop-base\PSVIWriter.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PSVIWriter\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PSVIWriter\.svn\text-base\PSVIWriter.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PSVIWriter\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PSVIWriter\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\PSVIWriter
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WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSTSHarness\.svn\prop-base\XSTSHarness.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSTSHarness\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSTSHarness\.svn\text-base\XSTSHarness.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSTSHarness\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSTSHarness\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSTSHarness
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSValueTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSValueTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSValueTest\.svn\prop-base\XSValueTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSValueTest\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSValueTest\.svn\text-base\XSValueTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSValueTest\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSValueTest\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all\XSValueTest
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8\xerces-all
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC8
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\.svn\entries
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\.svn
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\.svn\prop-base\xerces-all.sln.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\.svn\text-base\xerces-all.sln.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\.svn
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\all\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\all\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\all\.svn\prop-base\all.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\all\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\all\.svn\text-base\all.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\all\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\all\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\all
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\CreateDOMDocument\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\CreateDOMDocument\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\CreateDOMDocument\.svn\prop-base\CreateDOMDocument.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\CreateDOMDocument\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\CreateDOMDocument\.svn\text-base\CreateDOMDocument.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\CreateDOMDocument\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\CreateDOMDocument\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\CreateDOMDocument
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMCount\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMCount\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMCount\.svn\prop-base\DOMCount.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMCount\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMCount\.svn\text-base\DOMCount.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMCount\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMCount\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMCount
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMMemTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMMemTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMMemTest\.svn\prop-base\DOMMemTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMMemTest\.svn\prop-base
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMMemTest\.svn\text-base\DOMMemTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMMemTest\.svn\text-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMMemTest\.svn
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMMemTest
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMNormalizerTest\.svn\all-wcprops
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMNormalizerTest\.svn\entries
WARNING:conda.install:Cannot remove, permission denied: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMNormalizerTest\.svn\prop-base\DOMNormalizerTest.vcproj.svn-base
WARNING:conda.install:Cannot remove, not empty: C:\Anaconda3\pkgs\.trash\tmp9n2xgmlr\xerces-c-3.1.3\projects\Win32\VC9\xerces-all\DOMNormalizerTest\.svn\prop-base
Traceback (most recent call last):
  File "C:\Anaconda3\lib\site-packages\conda\install.py", line 270, in rm_rf
PermissionError: [WinError 5] Access is denied: 'C:\\Anaconda3\\Scripts/conda.exe'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Anaconda3\lib\shutil.py", line 381, in _rmtree_unsafe
    os.unlink(fullname)
PermissionError: [WinError 5] Access is denied: 'C:\\Anaconda3\\pkgs\\.trash\\tmp9n2xgmlr\\xerces-c-3.1.3\\projects\\Win32\\VC9\\xerces-all\\DOMNormalizerTest\\.svn\\text-base\\DOMNormalizerTest.vcproj.svn-base'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Anaconda3\Scripts\conda-script.py", line 5, in <module>
  File "C:\Anaconda3\lib\site-packages\conda\cli\main.py", line 120, in main
  File "C:\Anaconda3\lib\site-packages\conda\cli\main.py", line 130, in args_func
  File "C:\Anaconda3\lib\site-packages\conda\cli\main_update.py", line 64, in execute
  File "C:\Anaconda3\lib\site-packages\conda\cli\install.py", line 407, in install
  File "C:\Anaconda3\lib\site-packages\conda\plan.py", line 599, in execute_actions
  File "C:\Anaconda3\lib\site-packages\conda\instructions.py", line 135, in execute_instructions
  File "C:\Anaconda3\lib\site-packages\conda\instructions.py", line 82, in UNLINK_CMD
  File "C:\Anaconda3\lib\site-packages\conda\install.py", line 1127, in unlink
  File "C:\Anaconda3\lib\site-packages\conda\install.py", line 274, in rm_rf
  File "C:\Anaconda3\lib\site-packages\conda\install.py", line 1007, in move_path_to_trash
  File "C:\Anaconda3\lib\site-packages\conda\install.py", line 985, in delete_trash
  File "C:\Anaconda3\lib\site-packages\conda\install.py", line 285, in rm_rf
  File "C:\Anaconda3\lib\shutil.py", line 488, in rmtree
    return _rmtree_unsafe(path, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 378, in _rmtree_unsafe
    _rmtree_unsafe(fullname, onerror)
  File "C:\Anaconda3\lib\shutil.py", line 381, in _rmtree_unsafe
    os.unlink(fullname)
KeyboardInterrupt

>conda update conda
Cannot open C:\Anaconda3\Scripts\conda-script.py
```

I guess this is why it's "canary" :)



Discussion:
Well that's frustrating.  Thanks for the report.  Let me try to reproduce on windows right now.  In the meantime, can you give the me contents of your condarc file?

Ok, I wasn't able to reproduce yet.  My own output from windows below.

You basically have a broken conda right now, correct?  The easiest way to recover for you I think is to download the latest miniconda installer, and then point it at your `C:\Anaconda3` directory to overwrite or correct anything that got borked.

Output from trying to reproduce myself:

```
kfranz@DESKTOP-V5CQ93H MSYS ~/continuum/anaconda/packages/conda-4.2.1
$ conda install conda=4.1.9
Fetching package metadata .........
Solving package specifications: ..........

Package plan for installation in environment C:\Users\kfranz\Anaconda3:

The following packages will be DOWNGRADED due to dependency conflicts:

    conda: 4.1.11-py35_0 --> 4.1.9-py35_0

Proceed ([y]/n)?

Unlinking packages ...
[      COMPLETE      ]|##################################################| 100%
Linking packages ...
[      COMPLETE      ]|##################################################| 100%

kfranz@DESKTOP-V5CQ93H MSYS ~/continuum/anaconda/packages/conda-4.2.1
$ conda config --add channels conda-canary

kfranz@DESKTOP-V5CQ93H MSYS ~/continuum/anaconda/packages/conda-4.2.1
$ conda update conda
Fetching package metadata ...........
Solving package specifications: ..........

Package plan for installation in environment C:\Users\kfranz\Anaconda3:

The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    conda-4.2.1                |           py35_0         402 KB  conda-canary

The following packages will be UPDATED:

    conda: 4.1.9-py35_0 --> 4.2.1-py35_0 conda-canary

Proceed ([y]/n)?

Using Anaconda Cloud api site https://api.anaconda.org
Fetching packages ...
conda-4.2.1-py 100% |###############################| Time: 0:00:00 941.32 kB/s
Extracting packages ...
[      COMPLETE      ]|##################################################| 100%
Unlinking packages ...
[      COMPLETE      ]|##################################################| 100%
Linking packages ...
[      COMPLETE      ]|##################################################| 100%

kfranz@DESKTOP-V5CQ93H MSYS ~/continuum/anaconda/packages/conda-4.2.1
$ conda update --all
Fetching package metadata ...Remote site alias https://api.anaconda.org does not exist in the config file
........
Solving package specifications: ..........

Package plan for installation in environment C:\Users\kfranz\Anaconda3:

The following packages will be UPDATED:

    conda-build:        1.20.3-py35_0  --> 1.21.9-py35_0

The following packages will be DOWNGRADED due to dependency conflicts:

    anaconda-navigator: 1.2.2-py35_0   --> 1.2.1-py35_0
    hdf5:               1.8.16-vc14_0  [vc14] --> 1.8.15.1-vc14_4 [vc14]
    ipython:            5.0.0-py35_0   --> 4.2.0-py35_0
    jupyter_console:    5.0.0-py35_0   --> 4.1.1-py35_0
    llvmlite:           0.12.1-py35_0  --> 0.11.0-py35_0
    lxml:               3.6.1-py35_0   --> 3.6.0-py35_0
    nb_anacondacloud:   1.2.0-py35_0   --> 1.1.0-py35_0
    nb_conda:           2.0.0-py35_0   --> 1.1.0-py35_0
    ruamel_yaml:        0.11.14-py35_0 --> 0.11.7-py35_0

Proceed ([y]/n)?
```

Studying your output more, I think there were several things that happened.  First, as of conda 4.1 and later, channel order matters.  Also, `conda config --add channels conda-canary` actually has different behavior in 4.1 and 4.2 (changelog [here](https://github.com/conda/conda/releases/tag/4.2.0).  In 4.1, it is equivalent to `conda config --prepend channels conda-canary`.  In 4.2, it is equivalent to `conda config --append channels conda-canary`.  The behavior change is deliberate.  It's a safer default behavior for more inexperienced users.

I'm guessing your condarc has something like

```
channels:
  - defaults
  - conda-canary
```

which is why `conda update --all` wanted to downgrade conda.

The "going haywire" part with trash removal is what I'm more concerned about and don't have a good explanation for yet.

My `.condarc` looks like this:

```
>type c:\Users\mwiebe\.condarc
channels:
  - conda-canary
  - defaults
```

To recover, I've completely wiped out C:\Anaconda3 and reinstalled miniconda.

After installing miniconda3, it looks like I can alternate between `conda update conda` and `conda update --all` many times, and each command upgrades or downgrades.

```
C:\>conda update conda
Fetching package metadata ...........
Solving package specifications: ..........

Package plan for installation in environment C:\Anaconda3:

The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    conda-4.2.1                |           py35_0         402 KB  conda-canary

The following packages will be UPDATED:

    conda: 4.1.11-py35_0 --> 4.2.1-py35_0 conda-canary

Proceed ([y]/n)?

Fetching packages ...
conda-4.2.1-py 100% |###############################| Time: 0:00:00 522.38 kB/s
Extracting packages ...
[      COMPLETE      ]|##################################################| 100%
Unlinking packages ...
[      COMPLETE      ]|##################################################| 100%
Linking packages ...
[      COMPLETE      ]|##################################################| 100%

C:\>conda update --all
Fetching package metadata .........
Solving package specifications: ..........

Package plan for installation in environment C:\Anaconda3:

The following packages will be SUPERCEDED by a higher-priority channel:

    conda: 4.2.1-py35_0 conda-canary --> 4.1.11-py35_0

Proceed ([y]/n)? y

Extracting packages ...
[      COMPLETE      ]|##################################################| 100%
Unlinking packages ...
[      COMPLETE      ]|##################################################| 100%
Linking packages ...
[      COMPLETE      ]|##################################################| 100%
```

When you're on a 4.2.1 conda, what is the output of `conda config --show` and `conda config --show-sources`?

Here's that output:

```
C:\>conda --version
conda 4.2.1

C:\>conda config --show
disallow: []
ssl_verify: true
proxy_servers: {}
json: false
channels:
  - defaults
channel_priority: true
add_pip_as_python_dependency: true
channel_alias: https://conda.anaconda.org/
allow_softlinks: true
default_channels:
  - https://repo.continuum.io/pkgs/free
  - https://repo.continuum.io/pkgs/pro
  - https://repo.continuum.io/pkgs/msys2
track_features: []
offline: false
shortcuts: true
always_copy: false
always_yes: false
update_dependencies: true
changeps1: true
debug: false
show_channel_urls:
binstar_upload:
create_default_packages: []
auto_update_conda: true
quiet: false
add_anaconda_token: true
use_pip: true


C:\>conda config --show-sources
> cmd_line
json: False
debug: False
```

Wow ok.  Yes, this is exactly why we have canary.  Your condarc file isn't even getting picked up.
There's something I've apparently missed with windows installs.
What is the output of `conda info -a`?

Another odd thing is the error `Uncaught backoff with errno 2` when at version 4.2.1:

```
C:\>conda update conda
Fetching package metadata ...........
Solving package specifications: ..........

Package plan for installation in environment C:\Anaconda3:

The following packages will be UPDATED:

    conda: 4.1.11-py35_0 --> 4.2.1-py35_0 conda-canary

Proceed ([y]/n)?

Unlinking packages ...
[      COMPLETE      ]|##################################################| 100%
Linking packages ...
[      COMPLETE      ]|##################################################| 100%

C:\>conda update conda
Fetching package metadata ...Uncaught backoff with errno 2
......
# All requested packages already installed.
# packages in environment at C:\Anaconda3:
#
conda                     4.2.1                    py35_0    conda-canary
```

Here's the `conda info -a` output:

```
C:\>conda info -a
Current conda install:

               platform : win-64
          conda version : 4.2.1
       conda is private : False
      conda-env version : 2.5.2
    conda-build version : not installed
         python version : 3.5.2.final.0
       requests version : 2.10.0
       root environment : C:\Anaconda3  (writable)
    default environment : C:\Anaconda3
       envs directories : C:\Anaconda3\envs
          package cache : C:\Anaconda3\pkgs
           channel URLs : defaults
            config file : C:\Users\mwiebe\.condarc
           offline mode : False

# conda environments:
#
root                  *  C:\Anaconda3

sys.version: 3.5.2 |Continuum Analytics, Inc.| (defau...
sys.prefix: C:\Anaconda3
sys.executable: C:\Anaconda3\python.exe
conda location: C:\Anaconda3\lib\site-packages\conda
conda-build: None
conda-env: C:\Anaconda3\Scripts\conda-env.exe
user site dirs: C:\Users\mwiebe\AppData\Roaming\Python\Python27
                C:\Users\mwiebe\AppData\Roaming\Python\Scripts

CIO_TEST: <not set>
CONDA_DEFAULT_ENV: <not set>
CONDA_ENVS_PATH: <not set>
PATH: C:\Anaconda3\Library\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Gow\bin;C:\Program Files\Git\cmd;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\CMake\bin;C:\Program Files (x86)\Skype\Phone\;C:\cygwin\bin;C:\Program Files (x86)\QuickTime\QTSystem\;C:\HashiCorp\Vagrant\bin;C:\Anaconda3;C:\Anaconda3\Scripts;C:\Anaconda3\Library\bin;C:\Ruby22-x64\bin;C:\Users\mwiebe\bin;C:\Program Files\Docker Toolbox;C:\Users\mwiebe\AppData\Roaming\MiKTeX\2.9\miktex\bin\x64\;C:\Program Files\LAStools\bin
PYTHONHOME: <not set>
PYTHONPATH: <not set>

WARNING: could not import _license.show_info
# try:
# $ conda install -n root _license
```

Thanks for pointing out the `Uncaught backoff with errno 2`.  We've been having a lot of issues with files being locked on Windows, apparently by virus scanners.  That's some of the background for that debug message.  I'll look into it.

I've got ESET Endpoint Antivirus on the machine. Much of the realtime scanning that intercepts email, filesystem access, etc is disabled though, I found it slowed things down too much and interfered with too many programs.

I know what it is...

I guess I can't use the `$HOME` environment variable on Windows, as I did [here](https://github.com/conda/conda/blob/master/conda/base/constants.py#L57).

That's a great catch.  I'll have the fixed in 4.2.2.


Resolving patch:
diff --git a/conda/base/constants.py b/conda/base/constants.py
--- a/conda/base/constants.py
+++ b/conda/base/constants.py
@@ -62,9 +62,9 @@ def from_sys(cls):
     '$CONDA_ROOT/condarc',
     '$CONDA_ROOT/.condarc',
     '$CONDA_ROOT/condarc.d/',
-    '$HOME/.conda/condarc',
-    '$HOME/.conda/condarc.d/',
-    '$HOME/.condarc',
+    '~/.conda/condarc',
+    '~/.conda/condarc.d/',
+    '~/.condarc',
     '$CONDA_PREFIX/.condarc',
     '$CONDA_PREFIX/condarc.d/',
     '$CONDARC',


Test patch: