I've been trying to update iTunes to 10.3 for a while now and I keep getting the following message:

Question

The path 'C:\Documents and Settings\HP_Administrator\Local Settings\Application Data\Apple\Apple Software Update\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 from which you can install the product iTunes.
I have iTunes already, I've searched my entire computer, every drive, and there is no 'iTunes.msi' to be found anywhere.  How is it possible to get this file?  And if I'm currently running iTunes, shouldn't it exist on my computer somewhere, or is this something new for the update.  This problem started with the iTunes update to 10.2 blah, blah, blah, and now it continues with the 10.3.1.55 update.  HELP!!!!!!

Answer 1

The path 'C:\Documents and Settings\HP_Administrator\Local Settings\Application Data\Apple\Apple Software Update\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 from which you can install the product iTunes.
Unfortunately, this sort of trouble has gotten more complicated to deal with ever since Microsoft pulled the Windows Installer CleanUp utility from their Download Center on June 25. First we have to find a copy of the utility.
Let's try Googling. (Best not to use Bing, I think.) Look for a working download site for at least version 3.0 of the Windows Installer CleanUp utility. After downloading the utility installer file (msicuu2.exe), scan the file for malware, just in case. (I use the free version of Malwarebytes AntiMalware to do single-file scans for that.)
If the file is clean, to install the utility, doubleclick the msicuu2.exe file you've downloaded.
Now run the utility ("Start > All Programs > Windows Install Clean Up"). In the list of programs that appears in CleanUp, select any iTunes entries and click "Remove".
Quit out of CleanUp, restart the PC and try installing iTunes again. Does the install go through properly now?
(If you do find a clean download site for the correct version of CleanUp, please don't tell me where it is. Without wishing to sound paranoid (although I grant it does sound paranoid), there is a non-zero chance that posting links to download locations for the utility here at Discussions leads to that download location being shut down.)