I would like a screensaver that scans for viruses and other threats while the user is away from the computer, and therefore makes use of the idle time.
To make this useful it needs to store the variables about the state of the scan on the harddrive when it is interrupted (when the user comes back) so it don't have to start from the beginning each time the screensaver is activated,
(to prevent the beginning of the filesystem being scanned like 1000 times while the end might be scanned like 1 time, witch is stupid)
This brings me to a second idea but I will make a new topic about that.
see here:
http://forums.comodo.com/wishlist-cis/pause-resume-scan-even-after-restarting-the-computer-t82919.0.html