Another thing to note: during all this installing you need to be logged on with Administrator rights or the wrong things will happen. Most folks just run as Admin all the time, but some keep that separate on their machine. Closely related to being an Administrator is your UAC setting on Windows Vista and Windows 7. Adobe has this advice:
Installing an AIR application displays the error message: "Sorry an error has occurred. The application could not be installed. Try installing it again. If the problem persists, contact the application author." (Windows Vista / Windows 7)
This error may occur during installation if the user has turned off User Account Control (UAC) operating system feature and is a standard or restricted user. From Control Panel, Open UAC and enable it. A reboot maybe required, once complete, re-try the installation.
Does the avatar app run now? If not, we're going to have to go to Adobe tech support to figure out why. Before you do that, try doing the Adobe AIR install using an alternate browser. Firefox is especially compatible with most things and is less finicky than Microsoft Internet Explorer. Here is Adobe's AIR Troubleshooting page with their specific hints for each machine type.
In fact, I had one customer overcome their problem by simply trying the whole G-Wizard install (AIR + GWizard) in the Firefox browser instead of Internet Explorer. If you have Firefox installed, this is very easy to try. Just bring up Firefox, go to the Install Page (Calculator Install, Editor Install), and try again.