I started seeing signs of a virus I believe I got off a facebook group (computer slowing, weird things popping up, and things that I didn't download were on my desktop, etc). At one point I received a blue screen that crashed my last computer (I got out of it this time). I ran Norton antivirus and I think I caught it, and I also ran McAfee antivirus and antispyware, and whatever it is I think I got rid of most of it, but my computer is still slow, and once in a while I still get the blue screen. Is there anything else I can do, or is the damage that has been done permanent? Sorry if this isn't very understandable-I'm not very computer smart... Thanks for your help.