Windows 11 build 25951.1000

Build of Germanium
OS familyWindows 11 (NT 10.0)
Version number10.0
Build number25951
Build revision1000
ArchitectureAMD64, ARM64
Build labrs_prerelease
Compiled on2023-09-08
Expiration date
Timebomb2024-09-15 (+373 days)
Home (N, Single Language, China)
SE (N)
Pro (N, Single Language, China)
Pro Education (N)
Pro for Workstations (N)
Education (N)
Enterprise (Evaluation, G, GN, N, N Evaluation)
IoT Enterprise
About dialog

Windows 11 build 25951.1000 is an Insider Preview build of Germanium, the 24H2 development semester of Windows as a service. It was released to Windows Insiders in the Canary Channel on 13 September 2023, along with its server counterpart.

New features and changes[edit | edit source]

Shell[edit | edit source]

The network flyout on the lock screen has been redesigned with Mica.

Miscellaneous[edit | edit source]

  • Support for blocking NTLM for remote outbound connections has been implemented into the SMB client. This changes legacy behavior, where Windows Simple and Protected GSS-API Negotiation Mechanism (SPNEGO) would negotiate Kerberos, NTLM, and other mechanisms with the destination server to decide on a supported security package.[1]
  • Support for controlling the negotiate behavior for SMB 2 and 3 dialects has been implemented into the SMB server. This changes legacy behavior, where Windows SMB always negotiated the highest matched server dialect from SMB 2.0.2 to 3.1.1 clients.[2]

Bugs and quirks[edit | edit source]

  • Adjusting screen brightness may not work on some laptops.
  • The print queue may not be accessible.
  • The icons on the desktop may appear blank in certain cases. Refreshing the desktop would resolve this issue.
  • Certain popular games may not work correctly.
  • Text on highlighted items in Microsoft Management Console and some of its snap-ins may have a yellow color.

Updates[edit | edit source]

  • 25951.1010.rs_prerelease_flt.230908-1553 (KB5031089)
    • Released to the Canary Channel on 15 September 2023 (AMD64 and ARM64)

Gallery[edit | edit source]

References[edit | edit source]

  1. Pyle, Ned. SMB NTLM blocking now supported in Windows Insider, Storage at Microsoft. 13 September 2023.
  2. Pyle, Ned. SMB dialect management now supported in Windows Insider, Storage at Microsoft. 13 September 2023.

External links[edit | edit source]