2026’s first Windows 11 update is causing more problems now, as Microsoft enters damage control mode

The first Windows 11 update of 2026, KB5074109, is causing numerous issues, including a black screen, broken Outlook Classic, and problems with File Explorer. Microsoft has acknowledged three issues, such as Outlook Classic crashes for POP accounts, and has released fixes for some issues like Remote Desktop failure. Users are experiencing sleep problems, third-party app issues, and more. Microsoft is working on addressing additional bugs, with a cumulative update expected on February 10, 2026. The update has also impacted functions like Sleep mode (S3) on some PCs and caused problems with Citrix Director shadowing.