I am not stupid, I dont need protection. Just one of my friends got on one of my pc's and connected it to the internet. I just need to make sure that reason why it's crashing isnt due to a virus.
edit: and if you arent stupid then i guess you have heard of the search button. you will find about 20 threads asking the same question you did. but then again, you arent stupid, so im sure you know how to do that