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claude-code - 💡(How to fix) Fix [BUG][BUG] Cowork VM connection timeout on ARM64 Windows 11 Home [1 participants]

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anthropics/claude-code#48551•Fetched 2026-04-16 06:57:00
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Error Message

Error Messages/Logs

Code Example

vm_boot completed (126ms)
[60 seconds of waiting...]
Connection timeout, last completed step: add_plan9_shares
VM connection timeout after 60 seconds
RAW_BUFFERClick to expand / collapse

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 fails to start every time on ARM64 Windows 11 Home. The VM infrastructure starts successfully (all setup steps complete in under 1 second) but the Linux guest kernel never boots, causing a 60-second timeout. This happens consistently across multiple Claude versions and after multiple reinstalls.

cowork_vm_node.log

What Should Happen?

Expected: Cowork starts and the workspace VM connects successfully

Actual: VM connection times out after 60 seconds every time — the Linux guest never boots

Device: ARM64 Windows 11 Home (e.g. Surface Pro X / Snapdragon)

Error Messages/Logs

vm_boot completed (126ms)
[60 seconds of waiting...]
Connection timeout, last completed step: add_plan9_shares
VM connection timeout after 60 seconds

Steps to Reproduce

  1. Install Claude on ARM64 Windows 11 Home (Snapdragon)
  2. Open Claude and attempt to start a Cowork session
  3. VM times out after 60 seconds every time

Claude Model

Not sure / Multiple models

Is this a regression?

No, this never worked

Last Working Version

No response

Claude Code Version

1.1617

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Windows Terminal

Additional Information

No response

extent analysis

TL;DR

The issue is likely related to the ARM64 architecture and the Linux guest kernel failing to boot, so investigating the VM configuration and Linux compatibility may provide a workaround.

Guidance

  • Review the cowork_vm_node.log file for any specific error messages or clues that could indicate why the Linux guest kernel is not booting.
  • Check the VM configuration to ensure it is compatible with ARM64 architecture and Windows 11 Home.
  • Investigate potential issues with the add_plan9_shares step, as it is the last completed step before the timeout.
  • Consider testing the VM setup on a different device or architecture to isolate the issue.

Example

No code snippet is provided as there is no clear indication of a specific code-related issue.

Notes

The issue seems to be specific to the ARM64 architecture on Windows 11 Home, and the fact that it has never worked suggests a potential compatibility issue. Further investigation into the VM configuration and Linux compatibility is needed.

Recommendation

Apply workaround: The issue is likely related to the ARM64 architecture, so applying a workaround to configure the VM to be compatible with this architecture may resolve the issue.

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claude-code - 💡(How to fix) Fix [BUG][BUG] Cowork VM connection timeout on ARM64 Windows 11 Home [1 participants]