Virtualization (Hyper-V, VMware, VirtualBox)

1 guide

Run virtual machines with confidence — Hyper-V, VMware ESXi and Workstation, VirtualBox, and WSL2, plus the conflicts, networking, snapshots, and backup issues that trip people up.

Diagram-style cover showing CPU virtualization extensions being claimed by the Windows hypervisor while VirtualBox waits for VT-x to be freed

How to Fix VirtualBox VT-x Is Not Available (Conflict with Hyper-V)

VirtualBox says VT-x is not available (VERR_VMX_NO_VMX)? Here's how to free your CPU virtualization from Hyper-V, Memory Integrity, and WSL2 — and fix it for good.

Sysadmin Desk May 24, 2026 11 min read