Configuring a scan task schedule

You can run a virus scan task manually or schedule the task to run automatically.
There is no schedule installed with the program. Startup items are scanned every time you start your computer.
If the task settings do not meet your needs, you can edit the settings and enable automatic scans. To do so, select the task name in the main program window in the Scan section and open the settings window for that task by clicking Settings.
To establish a scanning schedule, check the automatic task start box in the Launch section. You can edit the conditions for starting the scan task in the Schedule window that opens when you click Edit.
The most important step is to determine the frequency of how often the virus scan task starts. You can select one of these options:
Once. The task will run once on the day and at the time that you specify.
Minutely. The time interval between scans is the number of that you specify It must not exceed 59 minutes.
Hourly. The interval between scans is calculated in hours. If you select this frequency, specify the interval in the schedule settings: Every n-th hour and enter the value for n. For example, enter Every 1 hour if you want the task to run hourly.
Daily - the task will run every several days. Specify how often the scan should run in the schedule settings:

In addition to the frequency, specify what time of day or night the scan task will run in the Time field.

Weekly - the scan task will run on certain days of the week. If you select this option, check the days of the week that you want the scan to run. Also enter the time at which the scan task will run in the Time field.
Monthly - the scan task will run once per month at the specified time.
Note that the scan task for startup items has a specific schedule. You can configure how it runs automatically every time you turn on the computer and/or download threat signatures updates. To do so, check the corresponding boxes in the Launch section of the task settings window.

If a scan task is skipped for any reason (for example, the computer was not on at that time), you can configure the task that was missed to start automatically as soon as it can. To do so, check Run task if skipped in the schedule window.

Also see:
Managing virus scan tasks