The error is not a sign of corrupted system files or failing hardware. It is a precise diagnostic message from the hypervisor indicating a capability mismatch — a request for CPU virtualization features that are either unavailable or already locked by another component.

: If you require maximum security for sensitive virtualized workloads, you can disable Hyper-Threading in your BIOS settings , though this will lower overall PC speed Are you currently experiencing system crashes or freezes alongside this event log?

The error may be caused by a specific device on a PCIe port. : Select View > Devices by Connection .

: Even if you do not manually run Virtual Machines (VMs), Windows features like Core Isolation (Memory Integrity) Windows Sandbox Windows Subsystem for Linux (WSL)

When you encounter Event ID 167, the hypervisor is essentially reporting a . Unlike software errors (e.g., insufficient RAM), error 167 indicates that the hypervisor cannot take exclusive control of the CPU’s virtualization extensions (Intel VT-x or AMD-V) for a specific Virtual Machine Partition (usually the root partition or a child partition).