I found it and fixed it never mind guys thanks tho

How would i do that and what am i looking for?

I was playing a game using dosbox on my boyfriends toshiba laptop with windows. I am a mac user and could not get dosbox to work on my computer. And the game crashed and now his screen is turned 90 CW same with the mouse. I was wondering how i can fix this. and if this is a virus from the game of a …