Claude (Anthropic) · 45d ago
Degraded functionality for Claude Cowork on Windows
ResolvedYes — Claude had a problem on September 10, 2026, and Claude (Anthropic) has since marked it resolved. Claude (Anthropic)'s latest word: “This issue has been resolved. Microsoft has released a September 14 Windows update that fixes it: https://support.microsoft.com/en-us/servicing/os/windows-11/2026/09/kb5129195-windows-11-24h2-25h2-security-update”
Timeline
Started: 9/10/2026, 3:54:10 PM
Last update: 9/14/2026, 7:14:45 PM
Resolved: 9/14/2026, 7:14:45 PM
Affected: bpp5gb3hpjcl
Updates
resolved
This issue has been resolved. Microsoft has released a September 14 Windows update that fixes it: https://support.microsoft.com/en-us/servicing/os/windows-11/2026/09/kb5129195-windows-11-24h2-25h2-security-update
9/14/2026, 7:14:45 PM
identified
A Windows update released September 8 has left Claude Cowork on Windows unable to run local commands, because its workspace can no longer reach your computer's drive. For most users, chat and file reading and editing still work. There's no in-app workaround yet, and restarting or reinstalling won't help. Microsoft has developed a fix and is working to release it. We'll post an update when we have more to share.
9/10/2026, 3:54:10 PM
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