Unable to uninstall older version of itunes

Question

Help! I'm trying to update my iTunes to the latest version, but i've gone from bad to worse.
I"ve downloaded the itunessetup.exe, but after going through a few paces I get this error message: "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 "iTunes.msi" in the box below. User source: (then there's a drop down that gives me two choices) C:\Documents and Settings\John\Local Settings\Application Data\Apple\Apple Software Update\ OR C:\Documents and Settings\All Users\Application Data\Apple Computer\Installer Cache\iTunes 7.4.3.1\
Whichever I pick, the result is the same, another error message, which says: "The path '(it repeats the path i listed above)\iTunes.msi' cannot be found. Verify that you have access to this location and try again, or try to find the installation package 'iTunes.msi' in a folder fron which you can install the product iTunes.
When I close those boxes, i get another error message that says "The older version of iTunes cannot be removed. Contact your technical support group."
So, I'm guessing that the problem has to do with removing the old version.
I have tried going to my "Change or Remove Programs" function. But when I try to remove iTunes, I get the original error message again ("The feature you are trying to use is on a network resource that is unavailable, etc ...).

Answer 1

(1) Download the Windows Installer CleanUp utility installer file (msicuu2.exe) from the following Major Geeks page (use one of the links under the "DOWNLOAD LOCATIONS" thingy on the Major Geeks page):
http://majorgeeks.com/download.php?det=4459
(2) Doubleclick the msicuu2.exe file and follow the prompts to install the Windows Installer CleanUp utility. (If you're on a Windows Vista or Windows 7 system and you get a Code 800A0046 error message when doubleclicking the msicuu2.exe file, try instead right-clicking on the msicuu2.exe file and selecting "Run as administrator".)
(3) In your Start menu click All Programs and then click Windows Install Clean Up. The Windows Installer CleanUp utility window appears, listing software that is currently installed on your computer.
(4) In the list of programs that appears in CleanUp, select any iTunes entries and click "Remove", as per the following screenshot:
(5) Quit out of CleanUp, restart the PC and try another iTunes install. Does it go through properly this time?