Windows 11 shutdown bug explained with causes, fixes, and workarounds to stop restarts, battery drain, and failed power-offs after updates.

Microsoft explains how Shift + Restart once enabled a fast reboot in early Windows and why modern Windows no longer supports ...

Because I thought I had discovered something nobody knew ...

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

Microsoft’s first major Windows 11 update of 2026 released on January 13 introduced a concerning bug that caused some PCs to ...

Wait, there was a fast restart?

The fix is for a bug that prevents some systems from shutting down, while another bug that prevents hibernation has no ...

Microsoft is investigating reports that some Windows 11 devices are failing to boot with "UNMOUNTABLE_BOOT_VOLUME" errors ...