Other than that, the antivirus must also be very good at protecting itself to prevent its processes from being forcefully terminated or modified by an external application so that it can continue to run on the system and monitor for suspicious activity.Ī simple example is attempting to end the avp.exe process that belongs to Kaspersky using the Task Manager and it shows an “Unable to terminate process” error window with the message “Access is denied”. An antivirus software must be efficient in detecting and blocking a malicious software to ensure that the computer stays safe while connected to the Internet or network.