Ryzen 3600 virtualization problem

[konrino]

Hello, 

Today i installed Oracle virtualbox and setup windows 10 pro on it. When i'm using single core everything is okay but when im changing to anything else than 1 thread (2,3,4,5,6 i tested) really wild and strange shit begins. 
First of all it can't boot properly, it keeps loging me in all the time, for small period of time you can see desktop but after this it will become black.Also It looks like a black window appears for a short period of time and it is extendable. As I narrow it down, the desktop briefly appears and when I click my mouse screen becomes again black. 

I try several options in virtualbox (yes i turned on cpu virtualization in bios, and i have latest bios installed) 
My cpu is ryzen 5 3600 and motherboard is asus rog crosshair 6 hero.

Any idea how to turn on more than 1 cpu thread in virtualbox? (Also my friend has ryzen 5 3600 and everything is working great). I need it to write manual for my program on clean environment.