Please help me!
My 4 GB iPod nano 2nd generation won't sync to my computer anymore! I hook up my USB cable with my iPod on it and it doesn't even react. My whole computer doesn't recognize my iPod anymore! It is not the USB cable; I have tried two others. I don't use limewire, but I have gotten songs from friends who do. My sister says I might have a virus.

If I do have a virus, how do I delete it without losing all 900 songs?! I have tried deleting then downloading iTunes again, and Quicktime, but it didn't work. Please help me out because I love my iPod!
~Foxxi Roxxi