oh my god dont ever say Norton is good! its absolute trash.. it cant even freese trojans.. it just slows your computer down and fills it with reg keys, and likes to say its scanning all your files when you dont need it to, and ends up crashing your PC.. i have said this so many times and no one believes me at first, but when they pay some bloke who knows how to charge 200£ who ends up reinstalling windows with fake reg keys, they listen to me. www.avast.com.. get the free home edition and register your email and get the key code for free AVG is pretty good though, use that for now.. also try and make sure the size of the file looks ok if your downloading stuff from kazaa n limewire or whatever.. if the file is under 100kb and its a song, its obv fake!