So, I've been searching around god-knows how many different forums / websites to try and figure out how to fix this problem (Backup error -20) because I can't update anything on my itunes OR itouch until it's fixed. The error started just a bit after I downloaded the 4.0 update =/ My itouch should be a generation 3 (I bought it from a friend a while ago) and I'm using my laptop which is a Windows Vista. I honestly am at my wits ends, and I'm hoping that someone here can help me (including explain things in laments terms, because I computer genius, I am not!) fix this problem, because I have no idea what to do! I'd really really appreciate it.