I can't help you install the updates. I'm guessing it reboots before the updates finish installing?
I don't do updates. Unless, one counts XP with SP2 as doing a update. Too many updates have been buggy, and some have been computer killers. Why update, if I may have to reload the OS?
Atguard, Winpatrol, and Hiren's Boot CD are my shield, armor, and sword. I disable updates. Why update something that's running just fine?