- • An emergency update (KB5064489) was released by Microsoft to fix a bug preventing Azure VMs from launching when Virtualization-Based Security (VBS) is enabled and Trusted Launch is disabled.
- • The issue primarily affects General Enterprise Azure VMs using the v8.0 configuration version, specifically those running Windows Server 2025 or Windows 11 24H2.
- • Users can verify if VBS is running by checking System Information (msinfo32.exe) and ensuring the Hyper-V role is not installed.
- • Immediate action required: affected organizations should apply the emergency update to restore VM functionality and review their VBS and Trusted Launch settings.
Microsoft has issued an emergency update (KB5064489) to resolve a critical bug that prevents certain Azure virtual machines from launching when Virtualization-Based Security (VBS) is enabled and Trusted Launch is disabled. This issue impacts General Enterprise VMs using the v8.0 configuration version, specifically those running Windows Server 2025 and Windows 11 24H2. Organizations must apply the update immediately to restore VM operations and check their VBS settings to prevent future disruptions. Users can confirm VBS status via System Information and should ensure that the Hyper-V role is not installed to mitigate risks.
