Cannot install new itunes update windows 7

Question

I get the following error message when I try to update to the new iTunes version:
"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 'iTunes64.msi' in the box below.
Use source:
C:\Users\****\App Data\Local\Apple\Apple Software Update\iTunes64.msi"
****=My name
I am trying to install the latest version and have been receiving the same error message for about a month. After that message this one pops up:
"The path C:\Users\****\App Data\Local\Apple\Apple Software Update\iTunes64.msi" cannot be found. Verify that you have access to this location and try again, or try to find the installation package 'iTunes64.msi' in a folder from which you can install the product iTunes"
And then this one:
"Errors occurred while installing the updates. If the problem persists, choose Tools > Download Only and try installing manually."
When I use Download Only and try to install manually as suggested, I get this message:
"The older version of iTunes cannot be removed. Contact your technical support group."
Can anyone please help me resolve this?
Thank you!

Answer 1

"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 'iTunes64.msi' in the box below.
Use source:
C:\Users\****\App Data\Local\Apple\Apple Software Update\iTunes64.msi"
****=My name
(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?