The installation was interrupted message after iTunes upgrade

Question

I would appreciate help with my problem. I'd like to use iTunes but it doesn't work.
Description of the problem: I was happily using iTunes for more than a year. I received a notice that a new version was available and I upgraded. When the installation was complete I received the following message:
"The installation was interrupted before iTunes could be completely installed."
iTunes is not listed in the Programs menu and there are no files at c:\program files\itunes (itunes folder is not there).
After subsequent downloads and installs, I get the same error. When I do the iTunes standard install, QuickTime is
available and works well. I went back to the previous version, but it continued to give me the same error. I found very old versions of iTunes on the web and they too had the same problem.
During the install the iTunes icon briefly appears on my desktop and then disappears. The message box indicating that the installation was interrupted occurs right after that.
I've tried to describe the problem in quite a bit of detail below to help avoid suggested fixes that have been tried and failed.
1. I have followed the steps in the KB article. Please see the details of that work below.
http://docs.info.apple.com/article.html?artnum=93976
2. I have Administrator access. I have verified that I'm part of both the Adminstrators and SERVICE groups under Impersonate a client after authentication. This process is found in the following doc:
http://docs.info.apple.com/article.html?artnum=300361
3. Windows is fully updated through the Windows Update utility. See Windows version info below.
4. I can install any other application. I use this computer for work and I can install and uninstall any other application
I try. No other known errors or problems. I've installed other applications that use Microsoft Installer and InstallShield installers without problems.
5. I tried the Quicktime standalone install and I received the notice that "The installation was interrupted..." Quicktime is now not found on the machine and there is no Quicktime files in the Program Files. During the middle of the installation, I received the following error. Error during QuickTime Standalone (7.1.0.210) install:
Error 1905.Module c:\program files\QuickTime\qtuiPanelControl.dll failed to unregister. HRESULT -2147220472 Contact your support personnel.
When I attempt to install iTunes from the standard install, Quicktime installs properly and works. It only fails during the standalone install.
6. No strange characters in the folder. There is no itunes folder so it contains no folder. The download exe is on my desktop.
7. Temp Folder emptied and machine restarted (many times)
8. Uninstall older versions - They are not listed as installed so there is nothing to uninstall. The Windows Clean Up utility does not list them so I can't use that tool to remove them. It appears that iTunes is cleaning itself up when the installation fails so there are no files. There is no iTunes folder at c:\program files\.
9. iPodService alert is not there so I don't need to delete it.
10. Redownload software - It has been downloaded many times. Each time I'm careful to permanently delete the previous install exe so it is redownloaded.
11. AntiVirus software has been disabled. I'm using McAfee VS Enterprise 8.0.0. I have also checked the AV logs to see if it has blocked an install or other event around that time - there is nothing in the AV logs to show any blocked or prevented activity. No activity at all because the software is disabled.
12. Registry - A search of "itunes" in the Registry Editor finds a lot of references. Too many to list, but most are in keys that apply to file types.
13. I have downloaded and attempted to install the Windows Installer 3.0 package from the following URL:
http://www.microsoft.com/downloads/details.aspx?FamilyID=5FBC5470-B259-4733-A914 -A956122E08E8&displaylang=en&Hash=9PV3FS4
I'm told by a box during the install that the version I have installed is newer than the one on the website and there is no need to install it.
14. The version of iTunes that I'm trying to install right now is 6.0.4.2. I've had this problem for at least three months so I've been trying many versions before its release.
15. Other than the mentioned AV program, I don't have a third-party firewall, anti-spyware or monitoring program installed.
System:
IBM ThinkPad T42
Windows XP Pro
1 GB RAM
McAfee VirusScan Enterprise 8.0.0
Microsoft Windows XP Professional
Version: 5.1.2600
Service Pack: 2.0
Location: C:\WINDOWS
Hot Fix: KB913446
IBM T42   Windows XP Pro  

Answer 1

It is a miracle - After about 9 months without itunes, the new release installed on my machine today and appears to be working.
7.0.0.70 is the verion I just installed.
Another note to add to this now resolved issue. I bought an AirPort Express and I was not able to install the Admin software on the CD. I received the same error as I received with iTunes and Quicktime. This leads me to believe that this problem is in the registry or some other installer issue that is specific to Apple installations. I will have to go home and try to re-install that software. Maybe the new iTunes version cleared up the problem.