Could you provide the screenshot of this message? I'd say that this doesn't come from Firefox itself.

I did not get a screen shot today. I will try to get one next time I use Firefox. It is a Firefox message though. Reads something along the line of Firefox is installing updates. It processes quickly, but it's annoying to have that pop up when i open the browser.

Try to run the Firefox program once as Administrator (right-click: Run as Administrator).

If you have trouble with the upgrade, use this link; http://www.mozilla.org/en-US/firefox/all/