Hello there korteas63,
I was looking into the issue you are describing and found an article that I think may be helpful for us here. It sounds like we need to remove ALL components of iTunes, and any of its associated services like Bonjour.
First this article will help you remove iTunes and its services, named Removing and Reinstalling iTunes, QuickTime, and other software components for Windows XP found here: http://support.apple.com/kb/HT1925
Use the Control Panel to uninstall iTunes and related software components in the following order. Then, restart your computer.
- Apple Software Update
- Apple Mobile Device Support
- Apple Application Support (iTunes 9 or later)
Important: Uninstalling these components in a different order, or only uninstalling some of these components may have unintended effects.
2. Verify iTunes and related components are completely uninstalled In most cases removing iTunes and its related components from the Control Panel will remove all supporting files belonging to those programs. In some rare cases those files may be left behind. After following the previous steps, you should confirm that the following files and folders have been removed and if any are left behind, remove them now:
- C:\Program Files\Bonjour
- C:\Program Files\Common Files\Apple\
- C:\Program Files\iTunes\
- C:\Program Files\iPod\ Note: Follow the additional steps at the end of this article if you receive the alert "Cannot delete iPodService.exe: It is being used by another person or program" when trying to delete this folder.
- C:\Program Files\QuickTime\
When those steps are completed go ahead and try installing iTunes again. Use this article to troubleshoot installing iTunes if the issue persists, Trouble installing iTunes or QuickTime for Windows from here