CJ, I am a BIS user on AT&T and have had the same problem. I wound up buying a new hard drive for one of my computers and had to reinstall everything. So far the App Loader is still showing up but the computer hasn't been restarted more than twice. I think Vista is just an ongoing problem with everything so I have just accepted that my home computer (with Vista) is not going to work right anyway.

I hope someone can answer this eventually.