Thanks for the replies guys I meant to get back on this, I sorted it out in the end. No problems (I hope) Don't like it when stuff messes with my set up. Is there any way to stop devices automatically installing drivers on your computer? I only want to use the USB port to charge my iPod up from my VAIO.
Marsimar- first thing I did was a sfc /scannow and it didn't throw up any problems. Also used CCleaner.