Windows 10 build 21343.1000

Windows 10 build 21343 (rs prerelease) is the twelfth Insider Preview build of Cobalt. This build was released on 24 March 2021 to all Windows Insiders on the Dev Channel.

Iconography improvements
Many icons in  and   have been updated to follow the Fluent Design system. As a result, user folders, drives and ribbon items in File Explorer, including Run, have been refreshed. Some Control Panel applets have also seen their icons revamped, including the app's default shell icon.

Bugs

 * The update process to this build has a chance of hanging for extended periods of time.
 * On some high-refresh monitors, games will be limited to 60Hz while users with variable-refresh-rate monitors may experience tearing issues.
 * The option to discard changes in custom caption styles is not working in this build.