Electronic counter countermeasure refers to various activities to prevent the enemy's or the enemy's electronic countermeasures from affecting the combat effectiveness of the enemy's equipment and personnel, so as to protect the enemy's war power from damage. The main measures include electronic counter reconnaissance, electronic counter-jamming, anti radiation destruction, anti directional energy blindness and anti computer virus infection.
According to the above definition, which of the following options does not involve electronic counter countermeasures:
Before the military exercise, the exercise command center shall check and kill the virus of the computer in advance