snigger!
there are two types of updates (if you are running internet security with virus and spyware)
you update the definitions often daily - and they install automatically
(this makes sure your scanner knows all the latest threats)
the other is a program version update (the only option if you are running just the firewall - )
if i remember correctly prog updates aren't automatic ... you download and then install the update manually
70-470-00 is the latest ver of security suite ... so I'm guessing it's definition updates you are talking about.
don't be tempted to skip them