[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?

The Cowork tab shows "Virtualization is not available — Claude's workspace requires Virtual Machine Platform, but the virtualization service isn't responding. Restart your computer to resolve this." Restarting does not resolve the issue. The %APPDATA%\Claude folder does not exist at all, meaning the VM never attempts to initialize.

This appears to be the same root cause as #27316, #27420, #29887, #32004, #37265, #42227, #45715.

Expected Behavior
Cowork should detect that virtualization is enabled and successfully initialize the VM workspace.

Actual Behavior
Cowork permanently shows the virtualization error. The %APPDATA%\Claude folder is never created. No logs are generated. The VM never attempts to start.

System Verification
| Check | Result |
|---|---|
| Virtual Machine Platform | ✅ Enabled |
| CoworkVMService | ✅ Running |
| %APPDATA%\Claude folder | ❌ Does not exist — VM never initializes |

Notes

• Regular chat in Claude Desktop works fine — only Cowork is affected.
• Restarting the computer does not resolve the issue.
• This is not a BIOS/system configuration issue — all virtualization features are confirmed enabled.

What Should Happen?

Cowork should detect that virtualization is enabled and successfully initialize the VM workspace.

Error Messages/Logs

La virtualizzazione non è disponibile
L'area di lavoro di Claude richiede Virtual Machine Platform, ma il servizio di virtualizzazione non risponde. Riavvia il computer per risolvere il problema.

Steps to Reproduce

1. Install Claude Desktop (latest version) from claude.ai/download
2. Enable Virtual Machine Platform and Windows Hypervisor Platform via Windows Features
3. Open Claude Desktop → navigate to Cowork tab
4. Observe: "Virtualization is not available" error appears immediately
5. Run Get-Content "$env:APPDATA\Claude\logs\cowork_vm_node.log" → path does not exist

Claude Model

Not sure / Multiple models

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

Claude 1.2278.0 (e5213f) 2026-04-13T17:49:21.000Z

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_