[Windows Phone 8 Development and Hacking] laurenti:
First I tried zip flash, then I tried flash separate partitions (EFIESP -> ok, then MainOS+Data -> fails). Same error.

Last edit : I found several errors when Unlock Root Access on ROM images :

30.11.2015 10:15:08.510: Found device on interface: 71de994d-8b7c-43db-a27e-2ae7cd579a0c
30.11.2015 10:15:08.510: Device path: \\.\F:
30.11.2015 10:15:08.510: Found device on interface: 86e0d1e0-8089-11d0-9ce4-08003e301f73
30.11.2015 10:15:08.510: Device path: \\.\F:
30.11.2015 10:15:08.510: Found device on interface: 53f56307-b6bf-11d0-94f2-00a0c91efb8b
30.11.2015 10:15:08.510: Device path: \\.\F:
30.11.2015 10:15:08.510: Found device on interface: 9e3bd5f7-9690-4fcc-8810-3e2650cd6ecc
30.11.2015 10:15:08.510: Device path: \\.\F:
30.11.2015 10:15:08.510: Found device on interface: 08324f9c-b621-435c-859b-ae4652481b7c
30.11.2015 10:15:08.510: Device path: \\.\F:
30.11.2015 10:15:08.510: Found device on interface: 7eaff726-34cc-4204-b09d-f95471b873cf
30.11.2015 10:15:08.510: Device path: \\.\F:
30.11.2015 10:15:08.510: Found device on interface: 0fd3b15c-d457-45d8-a779-c2b2c9f9d0fd
30.11.2015 10:15:08.510: Device path: \\.\F:
30.11.2015 10:15:08.542: Failed to retrieve device descriptor.
30.11.2015 10:15:08.542: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:08.542: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:08.542: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:08.542: Incorrect function
30.11.2015 10:15:08.542:
30.11.2015 10:15:08.620: Found device on interface: 71de994d-8b7c-43db-a27e-2ae7cd579a0c
30.11.2015 10:15:08.620: Device path: \\.\F:
30.11.2015 10:15:08.620: Found device on interface: 86e0d1e0-8089-11d0-9ce4-08003e301f73
30.11.2015 10:15:08.620: Device path: \\.\F:
30.11.2015 10:15:08.620: Found device on interface: 53f56307-b6bf-11d0-94f2-00a0c91efb8b
30.11.2015 10:15:08.620: Device path: \\.\F:
30.11.2015 10:15:08.620: Found device on interface: 9e3bd5f7-9690-4fcc-8810-3e2650cd6ecc
30.11.2015 10:15:08.620: Device path: \\.\F:
30.11.2015 10:15:08.620: Found device on interface: 08324f9c-b621-435c-859b-ae4652481b7c
30.11.2015 10:15:08.620: Device path: \\.\F:
30.11.2015 10:15:08.620: Found device on interface: 7eaff726-34cc-4204-b09d-f95471b873cf
30.11.2015 10:15:08.620: Device path: \\.\F:
30.11.2015 10:15:08.620: Found device on interface: 0fd3b15c-d457-45d8-a779-c2b2c9f9d0fd
30.11.2015 10:15:08.620: Device path: \\.\F:
30.11.2015 10:15:11.823: Failed to retrieve device descriptor.
30.11.2015 10:15:11.823: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:11.823: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:11.823: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:11.823: Incorrect function
30.11.2015 10:15:11.823:
30.11.2015 10:15:14.888: Failed to retrieve device descriptor.
30.11.2015 10:15:14.888: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:14.888: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:14.888: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:14.888: Incorrect function
30.11.2015 10:15:14.888:
30.11.2015 10:15:17.661: Failed to retrieve device descriptor.
30.11.2015 10:15:17.661: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:17.661: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:17.661: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:17.661: Incorrect function
30.11.2015 10:15:17.661:
30.11.2015 10:15:20.349: Failed to retrieve device descriptor.
30.11.2015 10:15:20.349: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:20.349: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:20.349: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:20.349: Incorrect function
30.11.2015 10:15:20.349:
30.11.2015 10:15:21.958: Found device on interface: 71de994d-8b7c-43db-a27e-2ae7cd579a0c
30.11.2015 10:15:21.958: Device path: \\.\H:
30.11.2015 10:15:21.958: Found device on interface: 86e0d1e0-8089-11d0-9ce4-08003e301f73
30.11.2015 10:15:21.958: Device path: \\.\H:
30.11.2015 10:15:21.958: Found device on interface: 53f56307-b6bf-11d0-94f2-00a0c91efb8b
30.11.2015 10:15:21.958: Device path: \\.\H:
30.11.2015 10:15:21.958: Found device on interface: 9e3bd5f7-9690-4fcc-8810-3e2650cd6ecc
30.11.2015 10:15:21.958: Device path: \\.\H:
30.11.2015 10:15:21.958: Found device on interface: 08324f9c-b621-435c-859b-ae4652481b7c
30.11.2015 10:15:21.958: Device path: \\.\H:
30.11.2015 10:15:21.958: Found device on interface: 7eaff726-34cc-4204-b09d-f95471b873cf
30.11.2015 10:15:21.958: Device path: \\.\H:
30.11.2015 10:15:21.958: Found device on interface: 0fd3b15c-d457-45d8-a779-c2b2c9f9d0fd
30.11.2015 10:15:21.958: Device path: \\.\H:
30.11.2015 10:15:23.672: Failed to retrieve device descriptor.
30.11.2015 10:15:23.672: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:23.672: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:23.672: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:23.672: Incorrect function
30.11.2015 10:15:23.672:
30.11.2015 10:15:25.782: Found device on interface: 71de994d-8b7c-43db-a27e-2ae7cd579a0c
30.11.2015 10:15:25.782: Device path: \\.\H:
30.11.2015 10:15:25.782: Found device on interface: 86e0d1e0-8089-11d0-9ce4-08003e301f73
30.11.2015 10:15:25.782: Device path: \\.\H:
30.11.2015 10:15:25.782: Found device on interface: 53f56307-b6bf-11d0-94f2-00a0c91efb8b
30.11.2015 10:15:25.782: Device path: \\.\H:
30.11.2015 10:15:25.782: Found device on interface: 9e3bd5f7-9690-4fcc-8810-3e2650cd6ecc
30.11.2015 10:15:25.782: Device path: \\.\H:
30.11.2015 10:15:25.782: Found device on interface: 08324f9c-b621-435c-859b-ae4652481b7c
30.11.2015 10:15:25.782: Device path: \\.\H:
30.11.2015 10:15:25.782: Found device on interface: 7eaff726-34cc-4204-b09d-f95471b873cf
30.11.2015 10:15:25.782: Device path: \\.\H:
30.11.2015 10:15:25.782: Found device on interface: 0fd3b15c-d457-45d8-a779-c2b2c9f9d0fd
30.11.2015 10:15:25.782: Device path: \\.\H:
30.11.2015 10:15:28.672: Failed to retrieve device descriptor.
30.11.2015 10:15:28.672: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:28.672: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:28.672: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:28.672: Incorrect function
30.11.2015 10:15:28.672:
30.11.2015 10:15:31.700: Failed to retrieve device descriptor.
30.11.2015 10:15:31.700: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:31.700: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:31.700: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:31.700: Incorrect function
30.11.2015 10:15:31.700:
30.11.2015 10:15:34.511: Failed to retrieve device descriptor.
30.11.2015 10:15:34.511: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:34.511: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:34.511: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:34.511: Incorrect function
30.11.2015 10:15:34.511:
30.11.2015 10:15:37.526: Failed to retrieve device descriptor.
30.11.2015 10:15:37.526: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:37.526: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:37.526: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:37.526: Incorrect function
30.11.2015 10:15:37.526:
30.11.2015 10:15:40.511: Failed to retrieve device descriptor.
30.11.2015 10:15:40.511: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:40.511: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:40.511: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:40.511: Incorrect function
30.11.2015 10:15:40.511:
30.11.2015 10:15:43.558: Failed to retrieve device descriptor.
30.11.2015 10:15:43.558: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:43.558: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:43.558: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:43.558: Incorrect function
30.11.2015 10:15:43.558:
30.11.2015 10:15:46.550: Failed to retrieve device descriptor.
30.11.2015 10:15:46.550: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:46.550: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:46.550: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:46.550: Incorrect function
30.11.2015 10:15:46.550:
30.11.2015 10:15:50.327: Failed to retrieve device descriptor.
30.11.2015 10:15:50.327: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:50.327: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:50.327: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:50.327: Incorrect function
30.11.2015 10:15:50.327:
30.11.2015 10:15:53.586: Failed to retrieve device descriptor.
30.11.2015 10:15:53.586: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:53.586: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:53.586: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:53.586: Incorrect function
30.11.2015 10:15:53.586:
30.11.2015 10:15:57.241: Failed to retrieve device descriptor.
30.11.2015 10:15:57.241: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:15:57.241: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:15:57.241: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:15:57.241: Incorrect function
30.11.2015 10:15:57.241:
30.11.2015 10:16:00.326: Failed to retrieve device descriptor.
30.11.2015 10:16:00.326: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:00.326: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:00.326: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:00.326: Incorrect function
30.11.2015 10:16:00.326:
30.11.2015 10:16:03.151: Failed to retrieve device descriptor.
30.11.2015 10:16:03.151: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:03.151: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:03.151: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:03.151: Incorrect function
30.11.2015 10:16:03.151:
30.11.2015 10:16:06.308: Failed to retrieve device descriptor.
30.11.2015 10:16:06.308: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:06.308: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:06.308: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:06.308: Incorrect function
30.11.2015 10:16:06.308:
30.11.2015 10:16:11.133: Failed to retrieve device descriptor.
30.11.2015 10:16:11.133: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:11.133: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:11.133: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:11.133: Incorrect function
30.11.2015 10:16:11.133:
30.11.2015 10:16:15.248: Failed to retrieve device descriptor.
30.11.2015 10:16:15.248: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:15.248: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:15.249: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:15.249: Incorrect function
30.11.2015 10:16:15.249:
30.11.2015 10:16:19.32: Failed to retrieve device descriptor.
30.11.2015 10:16:19.32: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:19.32: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:19.32: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:19.32: Incorrect function
30.11.2015 10:16:19.32:
30.11.2015 10:16:22.178: Failed to retrieve device descriptor.
30.11.2015 10:16:22.179: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:22.179: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:22.179: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:22.179: Incorrect function
30.11.2015 10:16:22.179:
30.11.2015 10:16:25.74: Failed to retrieve device descriptor.
30.11.2015 10:16:25.75: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:25.75: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:25.75: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:25.75: Incorrect function
30.11.2015 10:16:25.75:
30.11.2015 10:16:28.8: Failed to retrieve device descriptor.
30.11.2015 10:16:28.8: at ..(String )
at ...ctor(String devicePathName)
30.11.2015 10:16:28.8: Failed to initialize WinUSB handle. Device might not be connected.
30.11.2015 10:16:28.8: at ..( )
at ..( , String )
at ..(String )
30.11.2015 10:16:28.8: Incorrect function
30.11.2015 10:16:28.8: