[BUG]

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?

Title: Cowork: “Virtualization is not available” on Windows 11 Pro 23H2 (VM never initializes)

Description
After every restart, Cowork shows: “Virtualization is not available. Claude's workspace requires Virtual Machine Platform, but the virtualization service does not respond.”

System

• Device: Lenovo laptop
• CPU: Intel Core i7-1165G7
• OS: Windows 11 Pro 23H2
• Claude subscription: Pro

What I verified

• VirtualMachinePlatform: Enabled
• vmcompute (Hyper-V Host Service): Running
• CoworkVMService: Running
• bcdedit hypervisorlaunchtype: auto
• %APPDATA%\Claude\vm_bundles does not exist (VM never initializes)

Repro
1) Restart Windows
2) Open Claude Desktop → Cowork
3) Error appears immediately
4) Fresh reinstall (as Admin) works once, then returns after next restart

Related
GitHub issues: #27316, #27420, #29887

What Should Happen?

Claude Cowork should work

Error Messages/Logs

Steps to Reproduce

1. Restart Windows 11 Pro 23H2.
2. Open Claude Desktop and go to Cowork.
3. Observe the error immediately: “Virtualization is not available. Claude’s workspace requires Virtual Machine Platform, but the virtualization service does not respond.”
4. Confirm the VM never initializes (no %APPDATA%\Claude\vm_bundles folder).
5. (Optional) Reinstall Claude Desktop as Administrator, confirm it works once, then restart again to see the error return.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.68

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_