Game shuttering but actually a solution

I was playing gundam vs gundam exfb
One day my intel computer(I have both Amd and intel)
was very slow when playing emulators and other emulators. I thought my newly moved display was error. After tweak for 1day I know the reason for slow and game shuttering sound 

I downloaded all intel cpu driver support software
and turn on hyper v in windows restart turn off restart
and all emulator back to normal speed

what is hyper V in windows?