ITunes 9.1: Apple Mobile Device Support failure

iTunes was working fine for my on my Windows Vista Home Premium 64-bit laptop since I got my iPhone in November, including though all updates until 9.1. Using the standard Apple Update program, I chose to update iTunes and Quicktime. It downloaded the files and started the installation process. I initially did not watch all the process of the installation, but I was not given any errors upon completion. I then plugged in my iPhone and a message popped up that "Apple Mobile Device Support" was outdated and I needed to uninstall both Apple Mobile Device Support (I'll refer to it as AMDS for short) and iTunes and then re-install iTunes. I attempted to uninstall AMDS and it failed to uninstall. iTunes uninstalled without an issue. I finally used a program called "Perfect Uninstaller" to uninstall AMDS and clean the registry of its presence. It was finally gone. After a reboot, I tried to install iTunes again. This time, I watched the installation process. At one point, the progress bar went backwards as it "rolled back changes". It then proceeded to install other stuff. I again got no errors or notifications that there was any failure in installation, yet AMDS did not install... apparently the process that rolled backwards. I saw some support give an order of uninstall, so I uninstalled iTunes, QuickTime, Apple Software Update, Bonjour and then Apple Application Support. I again rebooted and attempted re-install of iTunes. Still no AMDS. I found the location Apple Software Update had stored files and attempted to run AppleMobileDeviceSupport64.msi. This went through the installation process and ended up failing... not giving a reason for failure, just that it failed. I then cleared as much as I could find other than my music and applications library of all Apple software. I still get failure after failure... but only AMDS is failing to install. Any ideas?

I realize I've not gotten a response, but in case someone is silently observing the issues I've been facing, I was looking through my log file more (thousands of lines) and think that giving a larger view of the log may help...
AMDS.log:
Action 13:18:25: MsiInstallDrivers.
DIFXAPP: ENTER: InstallDriverPackages()
DIFXAPP: INFO: 'CustomActionData' property 'DIFxApp Version' is '2.1'.
DIFXAPP: INFO: 'CustomActionData' property 'UI Level' is '5'.
DIFXAPP: INFO: 'CustomActionData' property 'componentId' is '{9AA3828A-F852-11DB-8E29-6C6B55D89593}'.
DIFXAPP: INFO: 'CustomActionData' property 'componentPath' is 'C:\Program Files\Common Files\Apple\Mobile Device Support\Drivers\'.
DIFXAPP: INFO: 'CustomActionData' property 'flags' is 0x17.
DIFXAPP: INFO: 'CustomActionData' property 'installState' is '2'.
DIFXAPP: INFO: 'CustomActionData' property 'ProductName' is 'Apple Mobile Device Support'.
DIFXAPP: INFO: 'CustomActionData' property 'ManufacturerName' is 'Apple Inc.'.
DIFXAPP: INFO: user SID of user performing the install is 'S-1-5-21-872938631-3044593670-4220321646-1000'.
DIFXAPP: INFO: opening HKEY_USERS\S-1-5-21-872938631-3044593670-4220321646-1000\Software\Microsoft\Win dows\CurrentVersion\DIFxApp\Components\{9AA3828A-F852-11DB-8E29-6C6B55D89593} (User's SID: 'S-1-5-21-872938631-3044593670-4220321646-1000') ...
DIFXAPP: INFO: ENTER: DriverPackageInstallW
DIFXAPP: INFO: RETURN: DriverPackageInstallW (0x5)
DIFXAPP: ERROR: encountered while installing driver package 'C:\Program Files\Common Files\Apple\Mobile Device Support\Drivers\usbaapl64.inf'
DIFXAPP: ERROR: InstallDriverPackages failed with error 0x5
DIFXAPP: RETURN: InstallDriverPackages() 5 (0x5)
Action ended 13:19:24: InstallFinalize. Return value 3.
Action 13:19:24: Rollback. Rolling back action:
Rollback: MsiInstallDrivers
Rollback: MsiRollbackInstall
DIFXAPP: ENTER: RollbackInstall()
DIFXAPP: INFO: 'CustomActionData' property 'DIFxApp Version' is '2.1'.
DIFXAPP: INFO: 'CustomActionData' property 'componentId' is '{9AA3828A-F852-11DB-8E29-6C6B55D89593}'.
DIFXAPP: INFO: 'CustomActionData' property 'flags' is 0x17.
DIFXAPP: INFO: 'CustomActionData' property 'installState' is '2'.
DIFXAPP: INFO: 'CustomActionData' property 'ProductName' is 'Apple Mobile Device Support'.
DIFXAPP: INFO: 'CustomActionData' property 'ManufacturerName' is 'Apple Inc.'.
DIFXAPP: INFO: user SID of user performing the install is 'S-1-5-21-872938631-3044593670-4220321646-1000'.
DIFXAPP: INFO: This was the component where the install failure occurred. The rollback for this component must have already occurred at the time of failure. No need to rollback again
DIFXAPP: ERROR: Rollback failed with error 0x2
DIFXAPP: RETURN: RollbackInstall() 2 (0x2)
Rollback: Copying new files
Rollback: Moving files
Rollback: Creating folders
Rollback: Deleting services
Rollback: Stopping services

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