Cannot use Itunes or Quicktime, nor can I uninstall them!....

The software worked fine until one day, maybe a month ago, that I was getting the "unexpected error" window everytime I open either programs. I get the window usually 3 seconds after opening the file, and nothing shows up but the error window. I try uninstalling and I receieve a "a fatal error has occured" window, and the uninstall stops.
I have NO clue how to go about troubleshooting this. I've done all there is with my knowledge and all that the support page has had to offer.
If anything has any input on this, that would be great!
Thanks!

Hi,
I had exactly the same problem you're describing, and I finally managed to resolve it yesterday. Here's what I did (with the caveat that although it did work for me, any manual deleting and registry editing is done at your own risk!):
*Uninstalled iTunes, and Apple Software Update from the Control Panel. Restarted the system.
*A complete manual uninstall of QuickTime, following the excellent advice given here: http://pabsungenis.livejournal.com/94683.html. The only thing I didn't do was install QuickTime at the end, as he recommends.
*Searched all hard drives for QuickTime folders and files, and deleted these. I found that in addition to the dll files in "Windows/System32", there was a QuickTime folder in System32 as well, which I deleted. In those cases when it seemed that a QT file was used by another 3rd party program as a plug-in, I just renamed or moved the file.
*I also manually removed all Apple folders under "Documents and Settings/<username>/Application Data" and "Documents and Settings/<username>Local Settings/Application Data" for every user on the system. Deleted the iPod, iTunes and QuickTime folders in Program Files as well.
*Emptied the Recycle Bin and restarted the system.
*Installed an older version of iTunes (7.4), which I found on www.oldapps.com.
*Restarted the system after installation had finished.
To my great relief, and surprise, this worked - I've now got iTunes up and running again! I haven't yet updated to a newer version, as this one seems to work well with my old 40GB iPod without video and my wife's 80GB iPod Classic.
Hope this helps,
Erik N

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