It used to be you could no longer post in an older topic after a certain relatively short period of time had elapsed since the date and time of the last post in a topic on this site, but apparently that did not apply when you made your post.
We haven't heard from mmorris since March 3, 2012. I doubt that he is going to respond to your post.
Yes, it's possible that his problem was Windows Installer was not working properly and needed to be fixed.
However, you'll note he lists his OS as XP in the first post.
You can't install version 4.5 of the Windows Installer in XP. The highest version that can be installed in XP is version 3 .
Vista that has no Windows SP updates or that has SP1 updates comes with version 4.0. When Vista SP2 updates have been installed, the Windows Installer version has been upgraded to version 4.5.
Or, you can choose to install the version 4.5 of it yourself, for whatever Vista installation you have.
In another topic about a similar problem in Vista, he tried to install the correct version of the version 4.5 of Windows installer, but he got an error message saying it wasn't appropriate. He had already installed the SP2 updates in Vista, so the error message may have been due to version 4.5 having already been installed.
Unfortunately, he chose to install his brand name software installation from scratch, so he didn't try any of the ways we suggested or pointed him to to fix what was wrong with the Windows Installer.
I'm not sure what Windows Installer version Windows 7 comes with - I suspect it's version 4.5.
Apparently if the Windows Installer version has been upgraded that doesn't show up in Add or Remove Programs in 2000 or XP, or in Programs and Features in Vista or Windows 7.
Which version of Windows Installer that has been installed in 2000 and up can be determined by typing: msiexec in the CMD window.
If there is something wrong with Windows Installer, you'll probably get an error message when you do that rather than the Windows Installer version being displayed.
The Windows Installer version not working properly is only one of the reasons Windows updates don't install properly.
If Windows Installer stopped working properly after some point in time, since Automatic Update requires that Windows Installer is working properly when it installs any update, or at least when it installs most of it's updates, examining the Windows Updates or Microsoft Updates history and looking for updates that failed to install will yield you an approximate date and time when it stopped working properly.
You may see that ALL updates failed to install after a certain date and time. In that case, the Windows Installer not working properly is probably the cause of all of them failing to install.