Take a Hike - S1.E53

When Hock is sent into the school computer in order to tamper with the summer school program files, the school sends an anti-virus system to destroy him. Then Kilokahn alters the anti-virus to look like Manfu - and turn him evil - to get Servo to try to destroy it, not knowing what consequences would lie in wait should the anti-virus be destroyed....it could mean summer school forever!