Im sure Norton has some kind of disclaimer for that so don't even bother. Try one more thing. Download
Avast, its an antivirus program. I know you already have one but try it anyway. Its Completely FREE. Its a 60 day trial but if you decide you want to keep it, it's still free. When you go to the link i've provided to you, scroll down a little and you will see a list of different versions. Download the one that applies to you. Its just a choice of languages to choose from. Then start the program, uppdate it by clicking the little lightning bolt thing, turn on "scan local drives" by clicking the upper right icon just above the cd looking thing. Then click the play button on the left. This may take a considerable time to complete the scan but it's worth a try. If it finds anything, just do what it suggests and move it to the chest. I can almost gaurantee you that it will find something. If you do not want the program when you are done, just uninstall it.