|MS may have hidden msconfig with windows 7. With earlier versions you just go to START--RUN and type in msconfig and click OK. Give that a try and see if it works. I'm running an old XP machine so can't try it myself.|
Anyway, here's some info on locating and running it:
If the computer is starting on its own you need to go into cmos/bios setup and alter the 'start on' options.
I'm assuming these 'updates' are annoying but legitimate. If you have any doiubts about that you should run some virus/malware scans.