Becareful. I learned my lesson the bad way. I stop the internet update on my Vista. I am using WindowMail, once awhile the update stop me from accessing the address book. I went through a lot of forum, there is no good fix on my problem. MS blames the problem on the virus programs interacting with Vista. But the bottomline, a user, me, get the suffer. I have to rely on luck to access my email address book. When I need it the most, it does not work.