Zack do a scan with spybot see what it comes up with. Then try running malwarebytes,I'm not too familar with malware so I cant tell you much about that 1 but many folks us it and swear by it.
Oh and P2P is file sharing like a torrent site. I;m no expert and will bow to some of these guys who know their stuff,but over the years I surfed a couple of "shoe sites" myself and the only time I ever had a problem was when I relied on a name brand AV program.
Sure there may be some good ones out there,nod32 comes to mind if you want to pay for a program. However I've used avast and spybot for years,tried avast for awhile but it changed and started to use to many resources so I went back to avast. I think the 2 pronged approach works fairly well. As has been said there is no prefect AV program,otherwise everyone would use it.
Zack,worst case,you can always throw a pie at it and be done with it!