PC restarts when virtualization is turned ON?

From about two days I had random PC restarts – they were instant (without bluescreen). I was searching in my hardware – so I removed all hardware I could prom PCI Express, check ram and PC was still crashing. After turning off virtualization on CPU now everything is stable. Anyone with same issues?

My config:
Windows 10 19042.572 (20H2)
Maximus VIII Ranger
I7 6700K
32GB RAM DDR4
Bios: 3802
GeForce GTX 1060 6GB