Application Frame Host, WMI Provider host, COM surrogate....all functionality that Windows relies upon to run in the background to give you the Windows experience you expect. And all have little to nothing to do with your screen not turning off.
WMI stands for Windows Management Instrumentation. A big name for functionality that keeps track of how and when the available resources from your computer are being used. Pretty handy also when you need to keep track of resource usage from many computers in 1 central location. Application Frame host is used for standardizing how and when available resources are spent on applications running on your computer. COM is used to enable information exchange between applications and services that may or may not have information exchange functionality built into them. All without user interaction. MS Office automation used COM a lot. Now less and less, because of REST/JSON.
Yes, perhaps you could make the point that indirectly these functionalities can have an impact on your screen not turning off, but it is highly unlikely that any of these functionalities are the cause of your problem.
4wd is right (as per usual), sounds more and more like there is a problem within your Windows installation.
