[BUG] Cowork shows "requires a more recent installation" on Windows 11 after fresh reinstall of latest version (1.13576.0)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude desktop shows "requires a more recent installation" message even after a fresh reinstall of the latest version (1.13576.0) when I want to switch to Cowork. The Cowork tab is inaccessible. A colleague on the same version faces the same issue.

<img width="1536" height="864" alt="Image" src="https://github.com/user-attachments/assets/73c73c04-55fe-48f5-9204-e52d47eeb2c6" />

What Should Happen?

After installing the latest version of Claude for windows, Cowork should be accessible without prompting for reinstallation.

Error Messages/Logs

No error log surfaced. The app displays a dialog: "Cowork requires a more recent installation. Reinstall the desktop app to access Cowork and start delegating longer tasks." with a "Reinstall" button. Clicking it and reinstalling does not resolve the issue.

Steps to Reproduce

1. Download and install the latest Claude Code for Windows from claude.com/download
2. Open the app and navigate to the Cowork tab
3. A dialog appears: "Cowork requires a more recent installation"
4. Click "Reinstall", download and reinstall the app
5. Reopen the app — the same dialog appears again

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.13576.0 (1290fc)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_