As I said in my first posting. I HAVE uninstalled and re-installed iTunes several times. That includes following Apple's instructions specifically about which apps get uninstalled first. Checking to see that all the affected folders are indeed empty after the uninstall, then re-installing the programs in the specific order that Apple wants. I've looked at some of the other threads and it seems that a number of the other posters have the same occurrence, namely that iTunes tries to install the AppleMobileDeviceSupport app, but then it rolls back and apparently removes all the files that it tried to install. As I said in the first post, I have confirmed that the AppleMobileDeviceSuppoort.exe isn't corrupted, Its just not there. I wanted to know without trying another iTunes install (which failed at least 3 times), if I could manually install the .exe file needed and if there was a .dll file I needed to install. The iTunes bundle and install just isn't working.
I have this exact problem also. A lengthy talk with support at apple concluded that more investigation into the nature of the permissions in Windows was needed. So the problem has yet to be solved.
It does seem that the Apple Mobile Device "module" of Itunes is just failing to install. The Iphone shows up in the portable devices section of the device manager, and the rest of the Itunes functions fine.
Hopefully some new information on this will surface....
HERE IS THE SOLUTION: Itunes for windows 7 with iphone 5
Uninstall and remove all Itunes files. Restart. Install Itunes 10.7 This version installs fine (unlike 11) and is latest version that supports Iphone 5.
Search install drive for and rename the "iTunes Library.itl" file. Or else the program will abort when you start it. It needs to make a new library file.
Program works fine. Shuttin of auto sync and not syncing anything that you don't need to helps keep the program stable. Also not adding a TON of files to it seems to help.
Didn't work. Again, I get an error message that says "Apple Mobile Devices failed to open. Verify that you have proper authorization (i started the install as "Run as Administrator"), and the choices are Abort, Retry, and Ignore. Neither the Retry or the Ignore do any good. The AppleMobileDevice.exe just doesn't get installed on my computer.