Q: Will my newer version of itunes work if I unistall the new version of quicktime and reinstall a much older version like quicktime 6.5. I need the older version to operate some games that are incompatible with the newer ones.

Windows Hardware:

• A PC with a 1GHz Intel or AMD processor
• Intel Pentium D or faster processor is required to play Standard Definition video from the iTunes Store
• 2.0GHz Intel Core 2 Duo or faster processor is required to play HD video, an iTunes LP, or iTunes Extras from the iTunes Store
• 512MB of RAM; 1GB is required to play HD video, an iTunes LP, or iTunes Extras
• Screen resolution of 1024x768 or greater; 1280x800 or greater is required to play an iTunes LP or iTunes Extras
• DirectX 9.0-compatible video card with 32MB of video RAM; 64MB recommended
• QuickTime-compatible audio card
• Broadband Internet connection to use the iTunes Store
• iTunes-compatible CD or DVD recorder to create audio CDs, MP3 CDs, or back-up CDs or DVDs

Windows Software:

• Windows XP Service Pack 2 or later, 32-bit editions of Windows Vista, or 32-bit editions of Windows 7
• 64-bit editions of Windows Vista or Windows 7 require the iTunes 64-bit installer; for more information, visitwww.itunes.com/download
• QuickTime 7.6.7 or later
• 230MB of available disk space
• HD TV episodes can only be rented in the United States
• Ping is available in Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Japan, Luxembourg, Mexico, New Zealand, Norway, Spain, Sweden, Switzerland, Netherlands, United Kingdom, and United States
• Screen reader support requires Window-Eyes 7.1.1 or later; for information about accessibility in iTunes, visitwww.apple.com/accessibility

Looks like QuickTime 7.6.7 is required for the newest versions of iTunes.

This is an interesting one. Some of the Apple documentation hasn't caught up with the current state of affairs.

Although an iTunes for Windows 10.5.x doesn't always need a standalone QuickTime to be installed, you might need a QuickTime for some older content files:

iTunes 10.5 for Windows: Older media files may require QuickTime

It's not clear to me precisely what happens when a 10.5.x and a QuickTime modern version is installed on a PC. (Like on mine for example.) In particular, I'm not sure if the iTunes install uses the available QuickTime install for audio or video playback, or if it always defaults to using the QuickTime-based componentry built in to iTunes and Apple Application Support. So I'm not sure if there's the potential for an iTunes-QuickTime and QuickTime-Quicktime componentry version mismatch if you're running a 10.5.x and a 6.5.2.10 on the same PC.

It might be worth a try. If you run into any trouble with the 6.5.2.10, post back to let us know what the symptoms are. (If it turns out to be a componentry-version-mismatch-related error, we should be able to get iTunes launching again by uninstalling the older QuickTime.

QuickTime will run on XP operating system. My concern would be if there is a iTunes music library? If you don't have one it doesn't make any difference what you try. If you do have a library I'd make sure to back it up