[BUG] Cowork "Virtualization is not available" on Windows 11 Pro 24H2 — Hyper-V fully enabled and services running

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?

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported with this exact configuration
• [x] I am using the latest version of Claude Desktop

What's Wrong?

Cowork shows "Virtualization is not available — Claude's workspace requires Hyper-V,
but the virtualization service isn't responding. Restart your computer to resolve this."

This persists after a full clean reinstall and multiple restarts.
All Hyper-V components are enabled and services are confirmed running.

Steps to Reproduce

1. Install Claude Desktop (latest) on Windows 11 Pro 24H2
2. Enable all Hyper-V features via PowerShell
3. Confirm services are running
4. Open Claude Desktop → Cowork tab
5. Error appears immediately

System Information

| Check | Result |
|---|---|
| OS | Windows 11 Pro 24H2 |
| Microsoft-Hyper-V | ✅ Enabled |
| Microsoft-Hyper-V-Hypervisor | ✅ Enabled |
| Microsoft-Hyper-V-Services | ✅ Enabled |
| Microsoft-Hyper-V-All | ✅ Enabled |
| HypervisorPlatform | ✅ Enabled |
| vmcompute service | ✅ Running |
| vmms service | ✅ Running |
| bcdedit hypervisorlaunchtype | ✅ Set to Auto |

Verification Commands Used

Get-Service vmcompute
# Status: Running

Get-Service vmms  
# Status: Running

Get-WindowsOptionalFeature -Online | Where-Object {$_.FeatureName -like "*Hyper*"} | Select-Object FeatureName, State
# All components: Enabled

What I Tried

• Enabled Hyper-V via Windows Features UI
• Enabled all components individually via PowerShell (Enable-WindowsOptionalFeature)
• Set bcdedit /set hypervisorlaunchtype auto
• Full clean reinstall of Claude Desktop (deleted %APPDATA%\Claude, %LOCALAPPDATA%\Claude, %LOCALAPPDATA%\AnthropicClaude)
• Multiple restarts after each step

Expected Behavior

Cowork should detect that Hyper-V is fully enabled and services are running,
and launch the workspace successfully.

Actual Behavior

Error: "Virtualization is not available — Claude's workspace requires Hyper-V,
but the virtualization service isn't responding."

Additional Context

Related issues: #27316, #27384, #27420, #29532, #32588
This appears to be the same app-side detection bug affecting multiple users
across different Windows configurations.

What Should Happen?

Claude Desktop should detect that Hyper-V is fully enabled and all required
services (vmcompute, vmms) are actively running, and successfully launch the
Cowork workspace VM without errors.

Error Messages/Logs

Steps to Reproduce

1. Install Claude Desktop (latest version) on Windows 11 Pro 24H2
2. Enable Hyper-V components via PowerShell:

• Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
• Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-Hypervisor -All
• Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-Services -All

1. Run: bcdedit /set hypervisorlaunchtype auto
2. Restart the computer
3. Confirm services are running:

• Get-Service vmcompute → Status: Running
• Get-Service vmms → Status: Running

1. Open Claude Desktop
2. Navigate to the Cowork tab
3. Error appears immediately: "Virtualization is not available"

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.1.7053 (cc1949) 2026-03-16T22:55:50.000Z

Platform

Other

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_