Spiritually slowed to a snails pace, What should I do about my adult children messing up my Computer?

I agree enter a p word to get on line. It is obvious these adult children are still children. But God knows you love them but sometimes all that is left is tough love which our heavenly father uses with us. What they did is what you would expect a teenager or younger would do not a responsible adult. If you do not want to go the p word route and tough love route then simply tell them they are to remove all unauthorized stuff they put on it.