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

Microsoft is shifting focus to fixing Windows 11 performance and reliability after months of buggy updates, boot failures, and growing user frustration.

A fresh wave of Windows 11 update trouble is making the rounds, and this one is about as disruptive as it gets: some PCs reportedly can’t boot after installing the latest January 2026 security update.

Round and round we go.

If you encounter a Blue Screen on first boot only when you start it the first time in WIndows 11/10, use the following fixes: Clearing CMOS usually fixes booting issues. You can also try this. Please ...