The fact that it shows up on the work pc only means that you have a relationship with that computer and nothing about the one at home. There are threads here that talk about the way to remove AS4.0. you have to delete some files and may have to reload Outlook. I dont know what other problems you were having with 4.0 but it worked fine for me when I was still running wm2003 se. Did you try the 4.1 update to see if it fixed your problems? I will look for the threads on how to remove 4.0
edit: Go
to this thread , read all of the directions and replys before you try it. hope this helps.