
Windows 11 Patch KB5074109 Triggers Widespread System Instability
Microsoft’s January 2026 Windows 11 security update KB5074109, covering versions 24H2 and 25H2, includes over 100 fixes and three zero-days but has caused widespread stability problems—lockups, black screens, and graphics-related app failures; admins are advised to uninstall the update or use Known Issue Rollback, with GPU driver updates and certain cloud/remote desktop issues noted in ongoing remediation.


