Anthropic: Degraded functionality for Claude Cowork on Windows

Anthropic · anthropic.comImpact: majorResolved2026-09-14 19:14 UTC

Public — what happened

Summary

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 — 2026-09-10 15:54 UTC
Last update — 2026-09-14 19:14 UTC
Resolved — 2026-09-14 19:14 UTC

Source of record: provider status page. Mirrored as reported; times in UTC.

With SquidGrid — where it starts on the route

Independent path health

The status page is the symptom. SquidGrid measures the paths that reach Anthropic against their own baselines — whether the routes carrying your traffic degraded, at which handoff, and who owns that stretch.

🔒 Sign in to see

Customers get the live Provider Assessment Report for Anthropic: paths off baseline right now, where on the route conditions change, and its full incident track record.

Included with any paid plan.

Open the Anthropic report →

Related: Anthropic status & history. SquidGrid is not affiliated with Anthropic.