claude-code - 💡(How to fix) Fix [BUG] Cowork on Windows 11: VM starts successfully but child process exits code 1 immediately [2 comments, 3 participants]

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anthropics/claude-code#49395Fetched 2026-04-17 08:42:22
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Error Message

Error Messages/Logs

Code Example

Relevant log output (from C:\ProgramData\Claude\Logs\coworkd\user-*.log):
[process:e497e1f0-61c7-409a-b6ba-ae27c595caaa] started PID 5248
[process:e497e1f0-61c7-409a-b6ba-ae27c595caaa] direct child exited: code=1 signal=<nil>

From cowork-service.log:
[RPC] API reachability: REACHABLE
[RPC] Process e497e1f0-61c7-409a-b6ba-ae27c595caaa exited: code=1 signal=<nil>
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Preflight Checklist

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

What's Wrong?

Cowork consistently fails with "exit code 1" on Windows 11. The VM launches, mounts succeed, the API is reachable, but the child process crashes immediately after PID start.

What Should Happen?

cowork should work

Error Messages/Logs

Relevant log output (from C:\ProgramData\Claude\Logs\coworkd\user-*.log):
[process:e497e1f0-61c7-409a-b6ba-ae27c595caaa] started PID 5248
[process:e497e1f0-61c7-409a-b6ba-ae27c595caaa] direct child exited: code=1 signal=<nil>

From cowork-service.log:
[RPC] API reachability: REACHABLE
[RPC] Process e497e1f0-61c7-409a-b6ba-ae27c595caaa exited: code=1 signal=<nil>

Steps to Reproduce

Fresh install of Claude Desktop from claude.ai/download Open Cowork tab Start any task Process exits with code 1

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

No response

Claude Code Version

Claude Desktop: v1.3036.0.0 (MSIX)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

No response

extent analysis

TL;DR

The issue with Cowork consistently failing with "exit code 1" on Windows 11 may be related to the child process crashing immediately after PID start, and investigating the system environment or dependencies might provide a solution.

Guidance

  • Verify that the system meets all the requirements for running Cowork, including any specific dependencies or configurations needed for Windows 11.
  • Check the system's event logs for any errors that may occur around the time the child process crashes to gather more information about the cause.
  • Consider testing Cowork on a different Windows 11 machine or a different version of Windows to see if the issue is specific to the current environment.
  • Look into any recent changes or updates to the system or Cowork that might have introduced the issue, given that it's mentioned this never worked.

Notes

The provided information does not specify the exact cause of the child process crashing, so further investigation into system logs and environment settings is necessary. The fact that it never worked suggests a potential compatibility or configuration issue rather than a regression.

Recommendation

Apply workaround: Given the lack of information on a previous working version and the specificity of the issue to Windows 11, attempting to find a workaround or configuration adjustment that allows Cowork to run successfully on this platform seems like the most viable next step.

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claude-code - 💡(How to fix) Fix [BUG] Cowork on Windows 11: VM starts successfully but child process exits code 1 immediately [2 comments, 3 participants]