ITunes won't download to my computer

Question

ITunes was working fine until I tried to update to the latest version. When I did, things went wrong. I tried to reinstall but it would not work. I then tried to delete ITunes and even did a System Restore. Still no luck. When I try to run ITunes, a message comes up that some of the required files are missing and to reinstall ITunes. When I try to reinstall, it gets al;most all the way through the install process and a message comes up that older version of "Bonjour" cannot be removed and to contact my Technical Support Group. When I click that message off, the install keeps going for a few more steps and then suddenly stops, throwing up a box that says ITunes Installer Interrupted ..... your system has not been modified..... try again later

Answer 1

With the Error 2, let's try a standalone Apple Application Support install. It still might not install, but fingers crossed any error messages will give us a better idea of the underlying cause of the issue.
Download and save a copy of the iTunesSetup.exe (or iTunes64setup.exe) installer file to your hard drive:
http://www.apple.com/itunes/download/
Download and install the free trial version of WinRAR:
http://www.rarlab.com/download.htm
Right-click the iTunesSetup.exe (or iTunes64Setup.exe), and select "Extract to iTunesSetup" (or "Extract to iTunes64Setup"). WinRAR will expand the contents of the file into a folder called "iTunesSetup" (or "iTunes64Setup").
Go into the folder and doubleclick the AppleApplicationSupport.msi to do a standalone AAS install.
Does it install properly for you?
If instead you get an error message during the install, let us know what it says. (Precise text, please.)