Could you please let us know some of the basic information about your computer ;
What is the operating system ? (windows XP/vista/7)
Do you have any other security software installed ?
What is the DAT version of virus scan . (Click Navigation on security center and then click About)
How old is the computer ?
Did you try changing the scheduled scan timings and see if the scan runs as scheduled ? If not follow the below steps and update us on the outcome .
- Right-click the M icon by your system clock.
- Click VirusScan.
- Click Options.
- The VirusScan Options window appears. Click the Scheduled Scan tab.
- Check the box next to Scan My Computer at a scheduled time.