Windows 11 users are experiencing significant issues following the January 2026 update, including application crashes and problems with cloud storage services.
Application Crashes and Error Code 0x803F8001
Many users report that applications such as Notepad, Snipping Tool, and third-party apps like MSI's Armoury Crate and Alienware Command Center are failing to launch. The error code 0x803F8001 appears, accompanied by messages indicating that the app is "currently not available in your account." This issue is often linked to problems with the Microsoft Store or user account synchronization.
Cloud Storage Issues Affecting Outlook
Another significant problem involves Microsoft Outlook freezing when accessing files stored in cloud services like OneDrive or Dropbox. This issue arises after installing the January 2026 update (KB5074109). Microsoft acknowledges that some applications may become unresponsive or encounter unexpected errors when opening or saving files to cloud-backed storage. For instance, Outlook may fail to reopen unless its process is terminated in Task Manager or the system is restarted. (theregister.com)
Potential Fixes
To address these issues, users can try the following steps:
- Reset Microsoft Store Cache: Open the Run dialog (Win + R), type `wsreset.exe`, and press Enter. This will reset the Store cache without changing account settings. (learn.microsoft.com)
- Sign Out and Sign Back In: In the Microsoft Store, click on the profile icon, select "Sign out," close the app, reopen it, and sign in again. (techbloat.com)
- Move PST Files Out of OneDrive: If Outlook is unresponsive due to PST files stored on OneDrive, moving these files to a local drive may resolve the issue. (theregister.com)
- Uninstall the Problematic Update: If the issues persist, uninstalling the January 2026 update (KB5074109) may help, though this will remove the security fixes included in the update. (windowslatest.com)
Conclusion
The January 2026 update for Windows 11 has introduced significant issues affecting application stability and cloud storage functionality. Users experiencing these problems should consider the suggested fixes and monitor for official updates from Microsoft addressing these concerns.
Microsoft Addresses Windows 11 App Crashes and Cloud Storage Issues:
- Microsoft isn't deleting your Windows 11 files, but OneDrive's sync system is causing confusion and frustration: "I think they should have to go to jail for this.", Published on Wednesday, January 14
- Microsoft expands Windows backup to include restore at first sign-in, Published on Monday, January 19