Cant run unreal because of "d3d being lost"

I’ve been trying to run unreal on my pc for about a week. It has only worked once since trying to use it since last week. I keep getting the d3d being lost message. I’ve updated my drivers and am using the latest veriosn of unreal. I’m using a software that has been recommended to me by a site to clean my pc however I doubt it will work. Can anyone help, thank you

What’s your machine spec?