[BUG] Cowork – Virtualization Not Detected on Dell XPS 14 9440 (Windows 11 Pro)

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 Not Detected on Dell XPS 14 9440 (Windows 11)
Summary: Cowork displays "Virtualization is not enabled" despite full Hyper-V stack being enabled and confirmed active.
System:

Dell XPS 14 9440
Windows 11
Claude Desktop [your version]

All enabled and confirmed:

VirtualMachinePlatform: Enabled
HypervisorPlatform: Enabled
Microsoft-Hyper-V-All and all sub-components: Enabled
systeminfo returns: "A hypervisor has been detected"
vmms service running
Task Manager CPU confirms Virtualization: Enabled
vm_bundles folder deleted, Claude Desktop relaunched as Administrator
Multiple reboots performed

Result: Cowork still displays virtualization error. MCP server connections also fail as a downstream consequence.
Related issues: #24918, #25136

What Should Happen?

Cowork should detect the active Hyper-V hypervisor and initialize the virtualization sandbox successfully, allowing the Cowork workspace to load and MCP server connections to establish normally.

Error Messages/Logs

Steps to Reproduce

Steps to Reproduce:

Install Claude Desktop on Dell XPS 14 9440 running Windows 11
Enable Intel Virtualization Technology in BIOS/UEFI
Enable the following Windows Optional Features: Microsoft-Hyper-V-All, VirtualMachinePlatform, HypervisorPlatform
Confirm all features show Enabled via Get-WindowsOptionalFeature
Confirm systeminfo returns "A hypervisor has been detected"
Confirm vmms service is running
Delete %APPDATA%\Claude\vm_bundles if present
Relaunch Claude Desktop as Administrator
Navigate to Cowork tab

Result: Cowork displays "Virtualization is not enabled" and cannot connect to MCP servers mcp-registry or Claude in Chrome.

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

1.1.3918 Claude for Windows

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="1400" height="817" alt="Image" src="https://github.com/user-attachments/assets/898a8d60-19f5-474d-9291-cc629141b2f1" />