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Tom’s Hardware
Tom’s Hardware
Technology
Aaron Klotz

Latest Windows 2022 Server Update Causes BSODs on AMD EPYC With VBS Enabled

Windows AMD Microsoft Memory VMware
Inspur.

Neowin reports that Microsoft's latest Windows Server 2022 update, KB5031364, is triggering blue screens of death on VMware ESXi hypervisors running on AMD's EPYC server CPUs. Microsoft confirms that the issue is partially related to Virtualization Based Security (VBS) being enabled in Windows Server 2022, which is a feature known to cause stability issues in the past. If you've installed this update, Microsoft recommends disabling "Expose IOMMU to guest OS" to work around the issue.

Specifically, this new bug affects the start-up procedure on guest VM's running on VMware's ESXi hypervisor. When a startup failure occurs, users can expect an error code to pop up featuring the words "PNP Detected Fatal Error." According to Microsoft's notes, VM servers with the update can expect the problem to occur if you have the following: an AMD EPYC server CPU, "Expose IOMMU to guest OS" enabled in VMware settings for the VM, and have both “Enable Virtualization Based Security” and "System Guard Secure Launch" enabled on guest hosts running Windows Server 2022.

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