On my computer, looking for family guy episodes. I installed some sort of codec onto my computer, because thats what the website said needed to be done to play it. Anyways, now my computer is screwed up in all sorts of little ways (Printer won't work, everything is super slow, anti-virus keeps pausing itself instantly) and most importantly, I am getting constant porn spam on my desktop. How do I get rid of this? I'll do whatever you tell me to... Just help me get it off...

