I don't think it's a Powerpoint issue.
It seems like a rather regular Windows 7 message. If you can provide the full and litteral text (without typos please, so we can google it; it's a great idea if you google it yourself first to test), we might be able to tell you where it comes from and what to do about it.
Why run such a powerpoint in an account that has administrative capabilities? Doesn't seem necessary and then it's safer to do it in a limited account.
So my school is running two TV screens in the main hallway, running PowerPoints that give general news updates to the school. However, around every half hour, a cmd prompt comes up. It says something to the extent of accessing a restartlog on the computer and being denied access. The computer account has admin privileges, so that isn't the problem. Can anyone tell me what the message means and how to stop it from interrupting the PowerPoint slide.