I think you mean “Boot Time Scan”
Scheduling the Boot Time Scan
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Click on the Menu button.
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Choose Schedule Boot Time Scan.
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Doing so displays a dialog allowing you to schedule virus scanning.
Check Archives, if you want scan all the archives.
Specify whether all the disks or just a specific folder should be scanned.
Select Advanced options for scheduling details.
Select how to automatically process infected files.
Choose how to automatically process infected system files.
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Click the Schedule button to confirm the settings.
And after that, a boot scan will start, next time you reboot your computer.