Degraded functionality for Claude Cowork on Windows

Minor · Started Sep 10, 2026 · 3:54 PM

⚡ Pulsetic detected this 80 minutes before Claude acknowledged it

Duration

Ongoing
Severity

Minor
Detection lead

80 min
User reports

Peak 7/hr

Summary

Degraded functionality for Claude Cowork on Windows

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.

Started

Sep 10, 2026 · 3:54 PM
Status

Identified
Duration

Ongoing
Severity

Minor

Detection lead

Pulsetic caught this 80 minutes early

Pulsetic detected

~80 min before acknowledgement

User reports and synthetic probes crossed the detection threshold
Claude acknowledged

Sep 10, 2026 · 3:54 PM

Via official status page

Event timeline

How this incident unfolded

●

Detected by Pulsetic
Sep 10 · 2:34 PM Pulsetic

User reports and synthetic probes crossed the detection threshold — 80 min before the official acknowledgement.
◆

Identified
Sep 10 · 3:54 PM Claude

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.