What the hell?!

Okay, enough is enough! Whoever's messing around with my laptop and making the screen change as I'm looking at it needs to STOP IT RIGHT NOW. You've had your fun. It's been frustrating the hell out of me all damn day. ENOUGH. What the hell is this? Some sort of virus? A prank?

...is anyone else's computer affected by these shenanigans? Or is this some sort of personal attack or hack job?