Windows 10 build 9833

Windows 10 build 9833 is a Technical Preview build of Windows 10, which was uploaded to BetaArchive on 9 February 2017 as an x64 version only in Simplified Chinese. Currently, it is the earliest build to incorporate flight-signing, a functionality which prevents the operating system from booting once the timebomb is triggered.

Window thumbnail border color
If window auto-colorization is enabled, the window thumbnail borders on the taskbar do not change color even after the wallpaper changes. This issue can be remedied by manually changing the window color through the Control Panel.