ITunes 10 Install on Win Vista x64 Failure

Question

Unable to install iTunes 10 on Windows Vista even after uninstalling iTunes completely.
I opened iTunes and it told me that there was a new version to download and install.  So I downloaded the iTunes64Setup.exe file and executed it, making sure to run it as administrator.  Long story short, the install failed with the message.
"There is a problem with this Wndows Installer Package. A program required for this install to complete could not be run. Contact your support or package vendor"
Things I have tried, all have failed.
1. Redown loading the file
2. Trying to install the 32 bit version (It says I need the 64bit version for my OS)
3. Completely uninstalling and reinstalling.  http://support.apple.com/kb/ht1925
4. Turning off Anti-Virus (AVG) and trying to install
When I look at the installed programs after getting the failure message, I see that it is installing the following applications.  So it's bombing out on the next step whatever that is.
Apple Application Support
Apple Mobile Device Support
Bonjour
This is what the iTunes64Setup log has to say...
=== Logging started: 10/20/2011 14:48:22 ===
Command Line:
Using single-platform PRODUCTCODE.
Product to install: {REMOVED JUST IN CASE IT's SENSITIVE INFORMATION}
Information on cabinet file 'C:\Temp\Downloads\iTunes64Setup.exe'
   Total length of cabinet file : 71256441
   Number of folders in cabinet : 1
   Number of files in cabinet   : 6
   Cabinet set ID               : 0
   Cabinet number in set        : 0
   RESERVE area in cabinet?     : no
   Chained to prev cabinet?     : no
   Chained to next cabinet?     : no
fdintCABINET_INFO
  next cabinet     =
  next disk        =
  cabinet path     = C:\Temp\Downloads\
  cabinet set ID   = 0
  cabinet # in set = 0 (zero based)
fdintCOPY_FILE
  file name in cabinet = iTunes64.msi
  uncompressed file size = 44986368
fdintCLOSE_FILE_INFO
   file name in cabinet = iTunes64.msi
fdintCOPY_FILE
  file name in cabinet = AppleSoftwareUpdate.msi
  uncompressed file size = 2323456
fdintCLOSE_FILE_INFO
   file name in cabinet = AppleSoftwareUpdate.msi
fdintCOPY_FILE
  file name in cabinet = AppleApplicationSupport.msi
  uncompressed file size = 20311040
fdintCLOSE_FILE_INFO
   file name in cabinet = AppleApplicationSupport.msi
fdintCOPY_FILE
  file name in cabinet = AppleMobileDeviceSupport64.msi
  uncompressed file size = 11078656
fdintCLOSE_FILE_INFO
   file name in cabinet = AppleMobileDeviceSupport64.msi
fdintCOPY_FILE
  file name in cabinet = Bonjour64.msi
  uncompressed file size = 2682368
fdintCLOSE_FILE_INFO
   file name in cabinet = Bonjour64.msi
fdintCOPY_FILE
  file name in cabinet = SetupAdmin.exe
  uncompressed file size = 73584
fdintCLOSE_FILE_INFO
   file name in cabinet = SetupAdmin.exe
Executing: "C:\Windows\system32\msiexec.exe" /i "C:\Users\root\AppData\Local\Temp\IXP925.TMP\iTunes64.msi"
Returning: 1603
I have spent many hours scouring the internet looking for solutions to this problem without success.  The information I do find seems to be several years old and all seem to be roughly the same, which is to completely uninstall iTunes and reinstall.  Right now I have no functioning iTunes all so I no ability to update or sync my iPod.  I'm hoping someone out there has the magic answer.  Thank You.

Answer 1

According to Apple's iTunes 10 download page system requirements are:
Windows Software
Windows XP Service Pack 2 or later, 32-bit editions of Windows Vista, or 32-bit editions of Windows 7
64-bit editions of Windows Vista or Windows 7 require the iTunes 64-bit installer
QuickTime 7.6.6 or later is required
200MB of available disk space
Screen reader support requires Window-Eyes 7.1.1 or later.