Black Squares/Boxes

I have same issue. Black squares everywhere, game and sound started to lag. I'm already played 12 hours without these problems and today i tried to turn on adaptive resolution (anti-aliasing turned on automatically). So from that moment, i had squares. If i turn on anti-aliasing - squares go away, but i cant play with anti-aliasing cuz i have laptop with i3 6006u and gt 940m. Previously i had something like 30 fps and now i have 15-20 fps, squares everywhere, game is unplayable.