[BUG] 1.3036.0: Cowork sessions crash with "Claude Code process exited with code 1" on Windows 11 Home

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 v1.3036.0 (cf521c) on Windows 11 Home.

Every Cowork message fails immediately with "Something went wrong - Claude Code process exited with code 1". Both new sessions and previously-working sessions fail. Regular Claude chat works fine — only Cowork is affected.

Cowork was working normally on this machine for months prior to today. No system changes were made on my end.

This appears to be the same failure pattern as issue #46029 (filed April 10 on build 1.1617.0), but now recurring on the latest build.

What Should Happen?

Cowork messages should process normally, as they did prior to today.

Error Messages/Logs

Something went wrong
Claude Code process exited with code 1
You can restart the conversation from an earlier message.

Steps to Reproduce

1. Open Claude Desktop v1.3036.0 on Windows 11 Home
2. Switch to Cowork
3. Send any message (new session or existing)
4. Error appears immediately

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

N/A

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

Failed troubleshooting:

• Restarted computer
• Clear Cache and Restart (via Help > Troubleshooting)
• Delete Cowork VM Bundle and Restart (full VM rebuild)
• Confirmed no VPN active
• Confirmed no antivirus beyond Windows Defender
• Confirmed on latest version (1.3036.0, released today)