I have gone to custom scan and followed the instructions for setting the full scan to run in the middle of the night as at the moment it starts when I am using the computer. I have input Thursday 3.00 and weekly. However when I get to the save page to implement this I get the message that "Norton 360 could not create the scan you requested. so how do i get it to do what i want as when scans are running vista just about stops working for hours.