Windows 10 build 21301.1000

Windows 10 build 21301.1000 is the fifth Insider Preview build of Cobalt, the 21H2 development semester of Windows as a service. It was released to the Windows Insiders in the Dev Channel on 27 January 2021.
It is the last build to include the Legacy Edge web browser, as in the next build it has been removed entirely and replaced with Chromium Edge.
== New features and changes ==
=== Intel Thread Director support ===
This is the first known build to enable the MSR_IA32_HW_FEEDBACK_THREAD_CONFIG MSR to support the Intel Thread Director, a feature first introduced by Intel Core 12th generation processors that helps schedule programs across higher performance and power efficient cores.https://twitter.com/thebookisclosed/status/1734648398282690728
=== User interface ===
==== Taskbar ====
Right-clicking on files within taskbar jump lists now allows the user to open their respective source locations.
==== Touch keyboard ====
Undocking the keyboard on 2-in-1 devices now switches to a smaller keyboard layout that can be moved across the screen. Updated symbols for both small and large modes have been introduced, and a visual feedback icon is now present at the left-hand side of the touch keyboard UI whenever the user shifts focus onto any applicable password field. An updated keyboard layout featuring , , and keys has been introduced when using Windows on a 12" display, and currency support was added for the N’Ko script's associated keyboard layout
==== Desktop Window Manager ====
The animation speed of the updated window animations first introduced as part of build 21277 has been slightly adjusted.
=== Miscellaneous ===
* Internal dictionaries for existing system languages were updated to provide more accurate text prediction and spell-checking results.
* Modifying the touchpad enablement states in the Settings application no longer requires administrative elevation.
== Bugs and quirks==
=== News and interests ===
* The taskbar button's layout is reset to "Show icon and text" after upgrading to this build.
* Sometimes the flyout cannot be dismissed with pen.
* The taskbar button can show stale information each time users log into their account.
* The flyout shows content in a single column before quickly switching to double column.
* The taskbar button's text can look pixelated in high resolution screens.
* Attempting to share content dismisses the flyout.
=== General ===
* The update process to this build has a chance of hanging for extended periods of time.
* There's a chance that the upgrade process to this build may fail with an IRQL_NOT_LESS_OR_EQUAL BSOD.
* The reliability of the Start menu and other modern apps may be affected in this build.
* Live preview doesn't work for pinned site tabs on some machines, a gray window is seen instead of the intended content.
== Updates ==
*21301.1010.rs_prerelease_flt.210123-1754 (KB5000626)
** Released on 1 February 2021 to the Dev Channel (x86, x64 and ARM64).
== Gallery ==
Win8boot.png|Boot screen
21301 TouchKeyboard1.png|Touch keyboard - nested options
21301 TouchKeyboard2.png|Touch keyboard - password feedback key
21301 JumpLists.png|Jump lists
== External links ==
* Official announcement
Category:Cobalt builds
Category:Windows 10 builds
== References ==