Windows 11 January 2026 updates may cause boot failures on some PCs. Microsoft is investigating issues linked to KB5074109.

A new Windows 11 update has caused major problems for some users and has frozen PCs, brought blue or green screens, or caused reboot loops where PCs repeatedly try to restart. "After I installed this ...

Anyone who has installed the preview version of the Windows updates for Windows 11 from last week could experience problems with the system. Reboot loops, blue or green screens may occur as a result.

Microsoft has discontinued the distribution of the Windows Update Preview for Windows 11. This is due to unexpected side effects. In the Windows Release Health notes, Microsoft's developers explain ...