Ive played Witcher 3 with out any issues, but since the mission with Merigold an the mask ball my game crashes after one minute and PC PC loses its connection to the screen. After restarting my pc everything is fine.
Specs:but the crashes still happens.
GTX 780
I7 4770k
Msi pc mate z92
BQ Pure Power 10

Sounds like a corrupted file to be honest. Others may have better solutions. Personally I archive my play files every few levels and go back that way.

If you can't go back, before the event started, I suggest you restart the whole game.

Eventually, when you get completely addicted, you'll be doing that quite a lot.