plinden said:I wouldn't try to boil them or freeze them - there's too much danger of damaging the computer.
Try to follow their trail to find where they're coming from (they're NOT living in the computer) and spread some cinnamon powder, or baby powder or chalk dust around the opening. They'll be gone in a couple of days. The ants currently in your computer won't be able to find their way back to their nest, and new ones will lose the pheromone trail leading them to your computer.