[BUG] (Windows 10 Pro x64, Hyper-V fully enabled, same HYPERVISOR_SERVICE_ERROR)

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?

OS: Windows 10 Pro x64, Build 19045 (22H2)
Claude Desktop version: 1.1.6679
Install type: Microsoft Store (MSIX)
Steps completed before filing:

Enabled Microsoft-Hyper-V via PowerShell
Enabled VirtualMachinePlatform (was already enabled)
Enabled HypervisorPlatform
Ran bcdedit /set hypervisorlaunchtype auto
Rebooted after each change
CoworkVMService confirmed running

Key log entries from cowork_vm_node.log:
2026-03-05 16:36:18 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-03-05 16:37:02 [warn] [startVM] VM not supported (win32/x64), skipping

2026-03-13 18:57:34 [error] [VM:start] VM boot failed: HCS operation failed: failed to create compute system: HcsWaitForOperationResult failed with HRESULT 0x80370102: {"ErrorMessage":"The virtual machine could not be started because a required feature is not installed.","ErrorEvents":[{"Message":"Cannot create system 'cowork-vm' since Hyper-V is not installed on the host."}]}
2026-03-13 18:57:34 [error] [VM:start] HCS error detected, available=true, missing=[], sentinel=HYPERVISOR_SERVICE_ERROR
Summary: Hyper-V is fully enabled and verified at every level, but Claude Desktop classifies this hardware profile (yukonSilver) as unsupported and fails with HYPERVISOR_SERVICE_ERROR. This appears to be the same issue reported in #27330 and #30997.

What Should Happen?

Claude Desktop Cowork should start.

Error Messages/Logs

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

Steps to Reproduce

IN Claude Desktop, click Cowork. Enter a task such as How can you help me organize Projects, Tasks, and Activities files?

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Command was not recognized.

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_