Same problem. I uninstalled iTunes and Quicktime, but I was unable to run the iTunes 7.4.3/Quicktime 7.3.1 installers from Apple, but I happened to have a iTunes 7.1 installer on my computer, which seems to work. Pretty long step backwards, but I never really needed the new features (not watching TV Shows or Movies on my computer, just want to download pod casts).
The OS of my computer Windows 2003 Server SP1