Dear Rwayne:
The solution to your problem is easy:
Open your AVG program from the system tray on the bottom right hand side of your screen. On top of your AVG open screen choose: TOOLS, ADVANCED SETTINGS, on the left pane click on SCHEDULES plus sign (+) and choose: SCHEDULED SCAN, choose: ACTION BASED, and click the arrow underneath and choose: ON COMPUTER START UP, next on the right hand side choose: 60 MINUTES DELAY. APPLY and OK on the bottom of the screen. What will happen is that the scan will start 60 minutes after your computer turns on. On the same screen (above) you can configure it for a specific time of the day. Back into TOOLS, ADVANCED SETTINGS you can choose: SCANS (+) and SCAN WHOLE COMPUTER and at the bottom move the slider to the right to choose FAST SCAN under SCAN PROCESS PRIORITY.
Hope it helps.