Question about background scans

I use Norton Security Suite version 4.3.0.5 on a computer running Windows 7, 64-bit.

 

This product has 4 parts: antivirus, firewall, backup and pctuneup. I only use the antivirus and firewall, and have backup and PC Tuneup turned OFF.

 

I notice that often when I am in the middle of working, a message pops up saying "Norton Security Suite is performing an idle-time full disk scan". These might not be the exact words of the message, but the meaning is similar.

 

I would like to set Norton up so that such "idle time" scans are run automatically, BUT ONLY within the hours of 1:00 a.m. and 6:00 a.m. To be absolutely clear, I do not want to do manual scans, where I have to remember to start the scan once a week. I want scanning to be automatic, but only to be run within those hours.

 

Is it possible to do this? Thanks.