whpx causes a blue screen on guest windows
Description of problem:
i wanted to install windows 7 with qemu, but qunad i tried i got a blue screen . Then I downgraded to version 5.0.2 and it worked perfectly, I also tried with windows 10 and it didn't boot.

![image](/uploads/3b69a76f8b23ae49652b010b1ae31d83/image.png)
Steps to reproduce:
1. install windows 7 iso
2. run the setup 
3. and the bsod..
Additional information:
I tried it with qemu 5.0.2 and it worked perfectly.