Det er da helt pip at gå fra Vista, nu da den er preinstalleret.
Du skal først prøve at følge disse råd fra
http://docs.info.apple.com/article.html?artnum=305042-en
Upgrading to Windows Vista
If you are upgrading from Windows XP or 2000 to Windows Vista prior to the next release of iTunes, here are a few steps that will improve your experience when syncing your iPod or playing iTunes Store purchases once upgraded to Windows Vista.
Deauthorize all iTunes Store accounts.
Enable Disk Use on all iPod models.
Uninstall iTunes.
Perform a clean install of Windows Vista (Highly recommended but not required).
Reinstall the latest version of iTunes.
Open iTunes.
Choose Authorize Computer from the Store menu in iTunes.
Customers who have upgraded to Windows Vista and are still experiencing issues playing iTunes Store purchases should download and run the iTunes Repair Tool for Vista after re-installing iTunes 7.0.2. Click here for more information about this tool.
Altså geninstaller iTunes 7.0.2.
Virker det ikke så følg rådene herover, eller kør iTunes repair værktøj.
VH Palle Hansen