After Update ITUNES Won't Open, Apparent Quicktime Problem, PLEASE HELP

Question

I Have recently updated my Itunes, after installation of the updates I was unable to access itunes due to a problem with Quicktime. After trying to repair quicktime, with no luck, I have uninstalled (following Apple’s support system). There were two programs labelled “Apple Application Support”, one allowed me to delete and the other older one didn’t delete and came up with the prompts below, so I just installed itunes/quicktime again. The same response happened when trying to open itunes. So I followed Apple’s support system and deleted all I could again. What was left is below, any help would be extremely useful.
In “Uninstall or Change a Program” of windows 7, I was unable to delete Version 1.1.0 which is 32.3 MB installed on the 03/03/2010 of the Apple Application Support.
*When deleting it comes up with a box that says:*
+The feature you are trying to use is on a network resource that is unavailable.+
+Click ok to try again, or enter an alternate path to a folder containing the installation package ‘appleApplicationSupport.msi’ in the below box.+
C:UsersSeanAppDataLocalTempIXP722.TMP
I could only follow the path to the “Temp” part …\IXP722.TMP does not exist in that folder.
_Any Help with this problem would be Greatly appreciated._

Answer 1

This kind of problem often responds to using the Microsoft Installer cleanup utility. Here is a method:
== uninstall with cleanup ==
Download a fresh copy of iTunes and the stand alone version of Quicktime (the one without iTunes)
http://www.apple.com/quicktime/download/win.html
http://www.apple.com/itunes/download/
Save the files on your PC.
Download and install Microsoft Installer cleanup utility, there are instructions on the page as well as the download. Note that what you download is the installer not the program – you have to run it to install the program. The installer doesn't give any message to confirm the installation.
http://support.microsoft.com/kb/290301/
(To run the program – All Programs>>Windows Install)
Now use the following method to remove iTunes and its components:
XP
http://support.apple.com/kb/HT1925
Vista and Windows 7
http://support.apple.com/kb/HT1923
*If you hit a problem with one of the uninstalls don't worry*, carry on with the deleting of files and folders as directed in the method.
When you get to deleting Quicktime files in the system32 folder as advised in the method, you can delete any file or folder with Quicktime in the name.
Restart your PC.
Run the Microsoft Installer Cleanup Utility. (Start > All Programs > Windows Install Clean Up)
Remove any references you find to the programs you removed - strictly speaking you only need to worry about those programs where the uninstall failed.
If you don’t see an entry for one of the programs that did not uninstall, look out for blank entries or numeric entries that look like version numbers e.g. 7.x for Quicktime or 1.x for Bonjour.
restart your PC
Install the stand alone Quicktime and check that it works.
If it does, install iTunes.
===