Prevent Idle Quick Scan

In Norton AntiVirus 2011 Computer Settings, under Computer Scans I have Idle Time Scans set to Off.

 

This prevents the Idle Full System Scan from running. However, the Idle Quick Scan still runs.

 

Can I prevent the Idle Quick Scan from running? I suppose I could increase the Idle Timeout to 30 minutes, since by that time my computer would be in sleep (S3) mode. But isn't there a better way?

 

Who would have thought that turning Idle Time Scans to Off doesn't really turn them off?