Windows 11 build 21370

10.0.21370.1003.fs_dev6_flt.210430-1730
Build of Windows 11
Screenshot
OS familyWindows 11 (NT 10.0)
Version number10.0
Build number21370
Build revision1003
ArchitectureAMD64
Build labfs_dev6_flt
Compiled on2021-04-30
Expiration date
Timebomb2021-10-31 (+184 days)
SKUs
Pro

Windows 11 build 21370 is an unconfirmed internal build of Windows 11, which was supposedly found by BetaWorld members on 8 June 2023, along with 21376, 21380 and 21385.[1]

This build is notable as it is the last known build to include Windows 10 branding in the watermark and winver, as the next known build changes the branding to Windows 11.

Interestingly, the Get Started app's Welcome page includes an internal UX design concept which features an earlier version of the Bloom wallpaper.

New features and changes[edit | edit source]

  • An early version of new OOBE is seen in screenshots, reusing animations from Windows 10X.
  • Taskbar icons are colorful instead of the theme-aware grayscale icons found in earlier internal builds.
  • According to BetaWorld, this build is the first build to have Segoe UI Variable font built in.

Gallery[edit | edit source]

References[edit | edit source]