The Windows 11 KB5074109 update, released in January 2026, is causing significant issues for users worldwide. Affected PCs are experiencing black screens, Outlook crashes, and problems with File Explorer.
Reported Issues
Users have reported that the KB5074109 update leads to a variety of system malfunctions. In addition to the black screen problem, some users are finding their computers cannot be shut down, and sleep mode is compromised. Furthermore, File Explorer settings in desktop.ini are being ignored.
- PCs experience black screens post update.
- Outlook and File Explorer encounter frequent crashes.
- Users unable to shut down or use sleep mode.
- Third-party apps like Citrix Director fail to operate.
Microsoft's Response
Microsoft has confirmed several issues and is working on fixes. Problems related to shutdown and remote desktop connections have been acknowledged and are being addressed, yet issues like the classic Outlook crash remain under investigation.
The company plans to release fixes in the next update cycle on Patch Tuesday, 2026-02-10. Reports of problems are marked as “looking into it” on the Feedback Hub, implying ongoing assessment.
For now, users impacted by the KB5074109 update might experience temporary disruptions. Microsoft has yet to provide a comprehensive statement on all issues reported.
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