Ok, so I had to format my PC, installed windows 7 and itunes from scratch, only question I've got now, whats going to happen when I connect my iphone? Lose all my contacts and apps?
I don't have an iPhone but I doubt you will lose your data and apps. One must think of what would happen if they use their phone on a different system (for example their laptop instead of their desktop).
Don't take my word for it though, just deducing from logic!