[BUG] SVM está bloqueado no hardware desta placa, independente do BIOS

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?

Cowork displays "A virtualização não está disponível" (Virtualization is not available) error on the Cowork tab. The workspace never initializes. The error persists after multiple restarts and after enabling all required Windows virtualization features.

Additional context:

Motherboard: Gigabyte B550M K (BIOS version F7, updated from F1)
CPU: AMD Ryzen 7 5700X
OS: Windows 11 Pro
SVM Mode option does not appear anywhere in BIOS after update
(Get-WmiObject -Class Win32_Processor).VirtualizationFirmwareEnabled returns False
bcdedit /set hypervisorlaunchtype auto was executed with no effect
IOMMU set to Enabled in BIOS
CoworkVMService is running
All three Windows features confirmed Enabled via PowerShell

What Should Happen?

Cowork should detect that Windows virtualization features are enabled and successfully start the VM workspace, allowing the user to use Cowork normally.

Error Messages/Logs

"O workspace do Claude requer Virtual Machine Platform, mas o serviço de virtualização não está respondendo. Reinicie seu computador para resolver isso."
(Translation: "Claude's workspace requires Virtual Machine Platform, but the virtualization service is not responding. Restart your computer to resolve this.")

Steps to Reproduce

Steps to Reproduce

Install Claude Desktop on Windows 11 Pro with administrator privileges
Enable Hyper-V, Virtual Machine Platform, and Windows Hypervisor Platform via PowerShell
Restart computer
Open Claude Desktop and navigate to Cowork tab
Observe "Virtualization is not available" error

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

Versão 1.1.8629 (befdfc)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Additional context:

Motherboard: Gigabyte B550M K (BIOS version F7, updated from F1)
CPU: AMD Ryzen 7 5700X
OS: Windows 11 Pro
SVM Mode option does not appear anywhere in BIOS after update
(Get-WmiObject -Class Win32_Processor).VirtualizationFirmwareEnabled returns False
bcdedit /set hypervisorlaunchtype auto was executed with no effect
IOMMU set to Enabled in BIOS
CoworkVMService is running
All three Windows features confirmed Enabled via PowerShell