Microsoft’s first update for Windows 11 in 2026 led to significant problems, prompting emergency fixes.
Update Details
- Initial Windows 11 update: January 2026.
- Shutdown issues: Affected Enterprise and IoT versions 23H2.
- Emergency fixes: Two out-of-band updates released.
- OneDrive and Dropbox: Crashes on versions 24H2 and 25H2.
- Boot failures: Investigation ongoing for UNMOUNTABLE_BOOT_VOLUME errors.
Administrative Impact
The emergency patches, issued over weekends, intensified workloads for IT administrators. These updates aimed to rectify shutdown problems and crashes caused by the original patch. Despite swift response, some issues remain unresolved.
Ongoing Investigations
Microsoft is examining reports of boot failures linked to the January 2026 update. Affected PCs may experience a blue screen error requiring manual recovery. Microsoft's findings will determine if the update is the root cause.
