Vista -  
When I load GTA it tells me to sign in.. so I do.. then it says there is an update for windows live.  When it trys to update the bar gets to like 99% then it stops there.  I have GTA on the exceptions list. 
What gives?  I bought GTA 24 hours ago and am yet to play a game that I can actually save. 
(having to sign up is ridiculous to begin with, for a non-multiplayer game) 
Any solutions, greatly appreciated... otherwise I'm taking this game back and buying Crysis.