Vista auto-reboot-for-updates #3

Yet again, I'm in the middle of my morning emailing, and all of a sudden, Vista decides to reboot without warning.  How the hell could M$ ever decide this was a good idea?  I really can't think of anything more frustrating than losing work.  And oh ya... it's been "Configuring updates" for the past 10 minutes now... awesome.  *sigh*