When I click on my iTunes icon an error message comes up saying it is corrupted or not installed correctly. I've had iTunes for three years and I don't know why this is happening now. What could be wrong?
Let's try a repair install of iTunes first.
Restart the PC. If you're using Vista or 7, now head into your Uninstall a program control panel, select "iTunes" and then click "Repair". If you're using XP, head into your Add or Remove Programs control panel, select "iTunes", click "Change" and then click "Repair".
Can you launch your iTunes now?