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Claude Code Issues / #27427

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

Status Fixed / completed
Maintainer reply None cached
Activity 7 comments · opened Feb 21, 2026 · closed Feb 21, 2026

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" />

View original on GitHub ↗

7 Comments

github-actions[bot] · 6 months ago

Found 3 possible duplicate issues:

  1. https://github.com/anthropics/claude-code/issues/27420
  2. https://github.com/anthropics/claude-code/issues/27386
  3. https://github.com/anthropics/claude-code/issues/27316

This issue will be automatically closed as a duplicate in 3 days.

  • If your issue is a duplicate, please close it and 👍 the existing issue instead
  • To prevent auto-closure, add a comment or 👎 this comment

🤖 Generated with Claude Code

vijjumodi27 · 6 months ago

I have same Issue in Dell Latitude 7440

jimhetzel67-dotcom · 6 months ago

Here is my cowork.vm_node.log:

2026-02-21 08:03:26 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 08:05:04 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:05:04 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 08:05:04 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 08:05:04 [info] [VM] Module loaded successfully
2026-02-21 08:05:04 [info] [Callbacks] VM event callbacks initialized
2026-02-21 08:05:06 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:05:08 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:05:12 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:06:15 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:06:16 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:06:18 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:06:22 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:10:40 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 08:11:30 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:11:30 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 08:11:30 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 08:11:30 [info] [VM] Module loaded successfully
2026-02-21 08:11:30 [info] [Callbacks] VM event callbacks initialized
2026-02-21 08:11:32 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:11:34 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:11:38 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:20:34 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:20:35 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:20:37 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:20:41 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:25:23 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 08:28:26 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:26 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 08:28:26 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 08:28:26 [info] [VM] Module loaded successfully
2026-02-21 08:28:26 [info] [Callbacks] VM event callbacks initialized
2026-02-21 08:28:26 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:27 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:27 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:29 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:30 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:34 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:34 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:40 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:41 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:42 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:42 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:44 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:44 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:48 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:28:48 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:29:38 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:29:39 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:29:40 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:29:40 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:29:42 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:29:42 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:29:46 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:29:46 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:52:51 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:52:52 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:52:54 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:52:58 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:58:36 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 08:58:59 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:58:59 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 08:58:59 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 08:58:59 [info] [VM] Module loaded successfully
2026-02-21 08:58:59 [info] [Callbacks] VM event callbacks initialized
2026-02-21 08:59:01 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:59:03 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 08:59:07 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 09:07:37 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 09:16:16 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 11:10:16 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 11:10:16 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 11:10:16 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 11:10:16 [info] [VM] Module loaded successfully
2026-02-21 11:10:16 [info] [Callbacks] VM event callbacks initialized
2026-02-21 11:10:22 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 11:10:29 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 11:10:38 [warn] [startVM] VM not supported (win32/x64), skipping

jimhetzel67-dotcom · 6 months ago

Closing as dupe, but this is a very prevalent windows error. Would like this solved ASAP.

falpek · 6 months ago

very frustrating

TilGut18 · 6 months ago

Same issue on Samsung Galaxy 950QED

Windows 11 Pro
all required resources enabled and confirmed. Reinstalled Claude Desktop to no avail..

Needs to be adressed asap. please.

github-actions[bot] · 6 months ago

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.

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