This is going to be pretty obscure, and Google is not getting the job done. Hopefully you guys will deliver.
This movie played on early 80’s HBO in heavy rotation. It was about some sort of light gun that you could shoot at someone, and the person who got hit would freeze while time continued around him. For example, the hero is being chased in his car, and he accidentally looks in the rearview mirror and gets “shot,” then wakes up with his car crashed in a fountain.
I don’t remember who was in it, or any details other than the fact that the company behind the gun was a computer company, and was using computers to rule the world through subliminal advertising…or something. And at one point (the finale?) the hero is being stalked in a stage where automated sets would move around to create computerized commercials.