[BUG] Windows 10 Pro: CoworkVMService Running but Cowork still shows Virtual Machine Platform error

Resolved 💬 2 comments Opened Apr 14, 2026 by phamanhduong07-commits Closed May 24, 2026

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?

Environment

  • OS: Windows 10 Pro
  • Claude Code Version: Latest
  • Platform: Windows

Bug Description

On Windows 10 Pro, the CoworkVMService is confirmed to be running (visible in Windows Services), but Cowork (Claude Code's remote development feature) still displays a "Virtual Machine Platform" error, preventing it from functioning correctly.

Steps to Reproduce

  1. Install Claude Code on Windows 10 Pro
  2. Ensure CoworkVMService is running (check via services.msc)
  3. Attempt to use Cowork / remote development features in Claude Code
  4. Observe the error message about "Virtual Machine Platform"

Expected Behavior

Since CoworkVMService is already running, Cowork should initialize successfully without displaying a Virtual Machine Platform error.

Actual Behavior

Cowork shows a "Virtual Machine Platform" error even though CoworkVMService is active and running in Windows Services.

Additional Context

  • The Windows feature "Virtual Machine Platform" may or may not be explicitly enabled in Windows Features, but the service CoworkVMService is confirmed running.
  • This issue appears to be a false positive check or an incorrect dependency validation in the Cowork startup sequence on Windows 10 Pro.

What Should Happen?

Since CoworkVMService is already running on Windows 10 Pro, Cowork should initialize successfully and work without displaying a "Virtual Machine Platform" error. The service check should correctly detect that the required VM service is active.

Error Messages/Logs

Steps to Reproduce

  1. Install Claude Code on Windows 10 Pro
  2. Ensure CoworkVMService is running (verify via services.msc - service status should be "Running")
  3. Open Claude Code and attempt to use the Cowork / remote development feature
  4. Observe that Cowork displays a "Virtual Machine Platform" error despite CoworkVMService being active

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Latest (not specified)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_

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