Cowork "Virtualization is not available" on Lenovo Yoga L13 Windows 11 — VM never initializes, no logs generated

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?

System

• Device: Lenovo Yoga L13
• OS: Windows 11
• Claude Desktop: Latest version (No Update Available confirmed)
• Install type: MSIX (Microsoft Store)

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

All system checks pass:

• CoworkVMService: Running
• vmcompute: Running
• VM Monitor Mode Extensions: Yes
• bcdedit hypervisorlaunchtype: set to Auto
• VirtualMachinePlatform: Enabled (Online: True)
• Full computer restart performed

Key symptom:
%APPDATA%\Claude\logs folder does not exist — VM never attempts to initialize.

Related issues: #27384, #27316, #27420, #27350, #29532

What Should Happen?

Cowork should detect that hardware virtualization is fully enabled and
operational, successfully initialize the VM, create the logs folder at
%APPDATA%\Claude\logs\, and load the Cowork workspace without errors.

Error Messages/Logs

No logs available — %APPDATA%\Claude\logs folder does not exist.
The Cowork VM never attempts to initialize, so no log files are generated.

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

PowerShell verification outputs:
- Get-Service CoworkVMService → Status: Running, DisplayName: Claude
- Get-Service vmcompute → Status: Running, DisplayName: Hyper-V Host Compute Service
- systeminfo | findstr /i "hyper-v" → Hyper-V Requirements: VM Monitor Mode Extensions: Yes
- bcdedit /set hypervisorlaunchtype auto → The operation completed successfully
- Enable-WindowsOptionalFeature VirtualMachinePlatform → Online: True, RestartNeeded: False

Steps to Reproduce

1. Install Claude Desktop (latest version) on Lenovo Yoga L13, Windows 11
2. Enable all virtualization features via Admin PowerShell (64-bit):

• Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
• Enable-WindowsOptionalFeature -Online -FeatureName VirtualMachinePlatform
• Enable-WindowsOptionalFeature -Online -FeatureName HypervisorPlatform
• bcdedit /set hypervisorlaunchtype auto

1. Perform full computer restart
2. Launch Claude Desktop
3. Click the Cowork tab
4. Observe: "Virtualization is not available" error appears immediately
5. Confirm %APPDATA%\Claude\logs folder 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

1.1.5368.0

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_