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claude-code - 💡(How to fix) Fix [BUG] Bug: Cowork "Virtualization is not available" [1 participants]

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anthropics/claude-code#45338•Fetched 2026-04-09 08:07:39
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Error Message

Error Messages/Logs

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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

Bug: Cowork "Virtualization is not available" — CoworkVMService never installs System Info:

OS: Windows 11 Pro 64-bit CPU: AMD Ryzen 5 3600 RAM: 16GB Motherboard: MSI (AMD) GPU: Radeon RX 5500 XT 8GB

What's enabled:

✅ Virtual Machine Platform ✅ Windows Hypervisor Platform ✅ Windows Subsystem for Linux ✅ AMD fTPM enabled in BIOS ✅ UEFI boot mode enabled ✅ Claude Desktop installed as Administrator

What's happening: Cowork shows "Virtualization is not available — Claude's workspace requires Virtual Machine Platform, but the virtualization service isn't responding." CoworkVMService does not appear in services.msc at all — it never installs. Reinstalling Claude Desktop as Administrator does not fix it.

What Should Happen?

allow claude to install right on the pc

Error Messages/Logs

Steps to Reproduce

What's happening: Cowork shows "Virtualization is not available — Claude's workspace requires Virtual Machine Platform, but the virtualization service isn't responding." CoworkVMService does not appear in services.msc at all — it never installs. Reinstalling Claude Desktop as Administrator does not fix it.

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

No response

Claude Code Version

N/A - using Claude Desktop

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

No response

extent analysis

TL;DR

The issue might be resolved by ensuring that the necessary dependencies and system configurations for virtualization are correctly set up and that the CoworkVMService is properly installed and running.

Guidance

  • Verify that the Virtual Machine Platform and Windows Hypervisor Platform are enabled in Windows Features, as they are required for virtualization to work.
  • Check the BIOS settings to ensure that virtualization is enabled for the AMD CPU, as some BIOS settings may override the Windows settings.
  • Investigate why the CoworkVMService is not installing, potentially by checking the installation logs or trying to install the service manually.
  • Consider reinstalling the Claude Desktop application and ensuring that all dependencies are correctly installed and configured.

Example

No specific code example is provided as the issue seems to be related to system configuration and service installation rather than code.

Notes

The issue may be specific to the user's system configuration or hardware, and further troubleshooting may be required to identify the root cause. Additionally, the lack of error messages or logs makes it difficult to provide a more specific solution.

Recommendation

Apply workaround: The user should try to manually install the CoworkVMService or investigate alternative solutions to enable virtualization on their system, as the issue seems to be related to the service not being installed or running correctly.

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