If I reset my macbook pro will it get rid of the viruses?
My macbook has been running incredibly slow, I'm not an expert at using my computer, but I think erasing everything would get rid of it. I also realized my sister has been using my computer for watching illegal free movies that contains many pop ups and gross advertisements that I think have been messing with my computer. Will my computer go back to normal? Thank you.
MacBook Pro, Mac OS X (10.7.5)