Same problem but solution doesn't work I've done this solution with deleting lower and updating the upper and reinstalling itunes a couple of times and still...
DiscriptionA digital media player for playing and organizing music and video files. Manages the content of the iPod and iPhone. You can purchase and download media from the iTunes Store via the Internet.
System Requirements
WindowsBroadband Internet connection (DSL/Cable/LAN) for buying and streaming music. · 32-bit editions of Windows XP Service Pack 2 or Vista, 64-bit editions of Windows Vista, 500 MHz Pentium class processor or better, 256MB RAM, Supported CD-R or DVD-R drive to burn CDs.
MacintoshCombo/SuperDrive to burn CDs, Broadband Internet connection (DSL/Cable/LAN) for buying and streaming music. · Mac OS X 10.3.9 or Mac OS X 10.4.9 or later required for iTunes, Mac OS X 10.4.10 or later required for iPhone, 500MHz G3 processor or better, QuickTime 7.4.5 or later, 256MB RAM.
Macintosh Video1GHz G4 processor or better, 16MB video RAM.
Windows Video2GHz Pentium class processor or better, 512MB RAM, 32MB video RAM.