I get a message every time I try to sync my ipod, "this copy of itunes is corrupted or not installed correctly" Any Help?
I'd suggest removing and re-installing iTunes on your computer. I'll link directions for both Windows XP and Windows Vista/7.
Removing and Reinstalling iTunes, QuickTime, and other software components for Windows XP
Removing and reinstalling iTunes, QuickTime, and other software components for Windows Vista or Windows 7
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