Windows 11 appears to have a boot failure bug that's caused by an update failure bug, creating a circle of, err, bugs

Round and round we go.
Windows Report

KB5074109 Update Causes Boot Failures on Windows 11 Devices

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

Microsoft confirms Windows 11 KB5074109 January update BSOD, boot issues on some PCs (commerical)

Windows 11 KB5074109 (January 2026 Update) is causing major issues on some PCs, and Microsoft has more details to share.

'Devices are failing to boot': Why the latest Windows 11 bug could cause Microsoft more grief

Windows 11 runs into another disastrous bug with its latest update — Microsoft admits an 'issue in which devices are failing ...

Windows PCs ‘Suddenly’ Fail After Microsoft’s New Update

This comes just hours after reports that another emergency update has been issued by Microsoft to affect other problems ...
TWCN Tech News

How to solve Disk Boot Failure, Insert System Disk error?

Use Automatic Startup Repair Verify the boot order Verify the hardware connection Use System Restore Repair the computer using Installation Media To learn more about these tips and tricks, continue ...