claude-code - 💡(How to fix) Fix [BUG] Windows 11 Pro - not running Co Work [1 comments, 2 participants]

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anthropics/claude-code#49030Fetched 2026-04-17 08:52:48
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Error Message

Error: yukonSilver not supported (status=unsupported)

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?

I can't seem to run Claude Co Work on my desktop after upgrading to the pro plan. My details are below.

Windows 11 Pro Pro plan Error: yukonSilver not supported (status=unsupported) HyperVisorPresent = True Claude version Claude 1.2773.0.0

What Should Happen?

Claude Co Work should run.

Error Messages/Logs

Steps to Reproduce

Download Claude on Windows 11 PRO, upgrade and then try operate Co Work.

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

1.2773.0.0

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

No response

extent analysis

TL;DR

The error "yukonSilver not supported" may indicate a compatibility issue with the HyperVisorPresent setting on Windows 11 Pro.

Guidance

  • Check the system requirements for Claude Co Work to ensure Windows 11 Pro is supported, especially with HyperVisorPresent enabled.
  • Verify if disabling HyperVisorPresent resolves the issue, as it might be interfering with Claude Co Work's functionality.
  • Review the Anthropic API documentation for any known issues or limitations related to the "yukonSilver" error.
  • Consider reaching out to the Claude Code support team for further assistance, as the error message suggests a specific, potentially known issue.

Notes

The provided information does not include specific details about the HyperVisorPresent setting or its impact on Claude Co Work. Therefore, the suggestions are based on the error message and the context of the issue.

Recommendation

Apply workaround: Try disabling HyperVisorPresent to see if it resolves the issue, as this setting might be causing the compatibility problem with Claude Co Work on Windows 11 Pro.

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claude-code - 💡(How to fix) Fix [BUG] Windows 11 Pro - not running Co Work [1 comments, 2 participants]