Provider incident title: “Degraded functionality for Claude Cowork on Windows”
Started
Thursday, September 10, 2026
03:54 PM UTC
Duration
4d 3h
total
Resolved
07:14 PM UTC
Sep 14, 2026
A Windows update released September 8 has caused Claude Cowork on Windows is unable to run local commands on your PC, because its workspace can no longer reach your computer’s drive. For most users, chat and reading or editing files still work. We have identified the cause as a change in Windows; Microsoft has developed a fix and is working on releasing it. There’s no in-app workaround yet, and restarting or reinstalling won’t help. We’ll post an update when we have more to share.
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
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This incident was sourced from Claude's official Atlassian Statuspage. Tickerr ingests updates every 10 minutes to surface incidents as they are posted by the provider.
This incident lasted 4d 3h.
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