After installing the March 2026 cumulative update (KB5079473), signing in with Microsoft accounts might fail for some Microsoft applications, including Microsoft Teams Free, Office apps, or OneDrive.Read more
Known Issues
C: Drive Inaccessible on Samsung Devices [Fixed]
After installing the February 2026 or March 2026 Cumulative Update, the C: drive may become inaccessible on some Samsung devices. Microsoft has acknowledged this issue. Please see the Windows Known Issues page: Windows 11, version 25H2 known issues and notifications | Microsoft Learn
Also, you’re unable to run Task Manager (taskmgr.exe). You receive the error “Windows cannot access C:\Windows\System32\taskmgr.exe“. Command Prompt (admin) and other tools don’t work.
The affected Samsung models are NP750XGJ, NP750XGL, NP754XGJ, NP754XFG, NP754XGK, DM500SGA, DM500TDA, DM500TGA, and DM501SGA.
October and November 2025 LCUs Roll back with Error 0x800F0922
If the October and November 2025 updates roll back with the error 0x800F0922, this post has the solution. The same issue occurs when installing the Windows 11 updates KB5066835, KB5070773, KB5067036, KB5067036, KB5068861, Windows 10 update KB5066836, and KB5066836 (OS Build 14393.8519) update for Server 2016. The following fix can be applied in that case.Read more
(26100.4061) Microsoft Print to PDF Error 0x800F0922
When you try to install the Microsoft Print to PDF feature on a system running Windows 11 24H2 OS build 26100.4061 or 26100.3915, the feature doesn’t install. It fails with the error 0x800F0922.Read more
24H2 Bug: Ellipsis Menu shows upwards
Windows 11 24H2 has a bug wherein the menu shows upwards, thus hidden from the viewport when the window is in a maximized state. This occurs when you click on the ellipsis icon (the button with three dots). It’s supposed to show the dropdown menu instead of upwards. This bug hasn’t been fixed at least until build 26100.3037.Read more