F-ck You XP Security 2012!!

So my computer has picked up a nice little bug called XP Security 2012. I have been working for days to get it completely removed from the computer. So far, no luck. I am going to have to use another computer to put posts up. And more will be coming as soon as tomorrow (or tonight if I can get that damn thing off the computer). So, if anyone knows how to clear this thing out, PLEASE HELP!!