DEP error "itunes has stopped working" FIX! (might work 4 other/all errors)

Question

I came across this problem and spent hours looking for a fix. From what I found on the internet, it seems as if Apple has no clue how to fix this problem, and tells u to contact Microsoft & Microsoft will tell you to contact Apple. I personally fix this problem myself on a laptop running Windows Vista 64 bit and on my own personal computer running Windows 7 32 bit. So more than likely this fix should work for just a bout any os. All and all, this fix is just a matter of uninstalling your iTunes and downgrading it to the next lowest version of iTunes. Example, if your running iTunes 9.x, uninstall that, and downgrade to iTunes 8.x. But anyways, I'm going to break it down as to exactly what I did.
1. Uninstall your version of iTunes (mines was 9.x).
2. Uninstall quick time, bonjour, apple application support, apple mobile device support & apple software update.
3. Reboot (not necessary, but I did it).
4. Download the next lowest version number of iTunes than what you had. If you had iTunes 9.x download iTunes 8.x. If u had iTunes 8.x download iTunes 7.x. That can be found here. http://www.oldapps.com/itunes.php (this fix was only test on computers running iTunes 9.x)
5. Install the older version of iTunes you just downloaded. For the first time iTunes runs, it will not work because it will give you a message about the 4 files in your music folder being created from a newer version of iTunes.
6. So to fix this problem, you will want to save those four files and "move" (not copy) them to your desktop. The files are iTunes Library Extras, iTunes Library Genius, iTunes Library & iTunes Music Library. Those files are responsible for any type of play list you created in iTunes and remembering your music library.
7. Restart your iTunes and it will be working again. Of course with an older version starting from stratch.
8. If you dont care about your previous play list and or organization of your iTunes and are just happy that it works again, then your good to go. Just delete the four files from step 6 and you don't need to pass this step. If you want your iTunes back to exactly how it was, then keep reading.
9. After downgrading your iTunes, when you run it for the first time, it will ask you to upgrade. Upgrade your iTunes like how you normally would any other time.
10. Close out iTunes if it remains open & replace the four files in the iTunes folder with the four files you moved to your desktop in step 6.
11. Restart your iTunes, and you should now have a fully working version of iTunes with all of your original play list and library.
Like I said before, this is my own personal fix & if it works for you then pass it on to the next person.

Answer 1

Fault Module Name:          ntdll.dll
Fault Module Version:          6.0.6002.18327
If the QuickTime Player is launching, I'm less inclined to wonder about an ATI Tray Tools conflict issue. (Although we may have to return to that ... symptoms for that particular issue have changed slightly before, and might have changed again. I was away from the forum for a few months, which is an eternity in this particular advice-provision business.)
On occasion, the ntdll.dll-referencing error has been associated with some sort of Apple Application Support damage. (In those cases, Safari for Windows also fails to launch on the same PC, also citing ntdll.dll in the problem report.) But in those cases a complete uninstall/reinstall can fix this.
Doublechecking, Leah. When you did your uninstall/reinstall, were you using the following document as a guide? (The "Verify iTunes and related components are completely uninstalled" section is particularly important if we've got damaged Apple Application Support program-file issues afoot.)
Removing and reinstalling iTunes, QuickTime, and other software components for Windows Vista or Windows 7