Am I correct that Security Center looks for updates only when there is activity on the computer? It seems to me that updates begin coming in -- making my hard disk crank and slowing my computer down to the point where it is almost unusable -- about 20 minutes AFTER I start work in the morning, not during idle down times in the middle of the night, which would be far more efficient. I estimate I lose a good 5 - 10 minutes of working time on my computer every day because of this, which is tremendously frustrating.
Is there some way I can configure Security Center to search for updates only when the computer is idle? (i.e. no mouse or keyboard activity) My Internet connection is cable, so it's up and running 24/7. I'm not talking about system scans, which I know I can schedule -- I'm talking about searching for and downloading DAT updates.