It is important to remember that for some people with ASD, no amount of negative reinforcement will ever change a behavior. Try instead watching a few times, and giving a reward for doing it properly. If he does it wrong, don't give him anything, no attention, no lecture, no punishment, no nothing.

I like to thank everyone for your advice. I was just hoping that by 19 that I wouldn't have to do visuals for
everything.

Would a graphic help? Post a picture of what to do to turn it off correctly and maybe put a piece of tape over the button on the surge protector to remind him. Explain to him if he can understand (my son refuses to do something if he doesn't know why he needs to do it).

Having to use patience when going through the steps of proper pc shut down may be stressing him out or making him aggitated. Positive rewards will help to make it a more positive experience rather than an irritating one. You may want to write down the steps with visuals for him to focus on, with the final step being a reward.

I have a daughter who is 11, when she does stuff that is wrong again and again taking things away as stated above did no good. we tied explaining the safety violation she had done, that helped for so long. Have you asked him why he does it? we did and it helped alot when trying to explain how wrong it was. We explained how it made us feel and responds well to that. Good luck i hope you find your answer.