rtvscan is the real time scan its needed for your complete protection however you can set this key to increase your battery life open registry start - run --regedit navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\AV\AdministratorOnly\General on the right hand side find the key SSPowerMgmt make the value 1 it wont run the scan when laptop is running on batteries. refer this discussion for more info http://www.symantec.com/connect/forums/delay-scheduled-scans-when-running-batteries