I seem to be the only person on the planet with this precise problem. I have no other computer issues, but when I open Resource Monitor, I can see the window frame with the title at the top and the three (File, Monitor, Help) buttons below it. The body of the window, however is totally empty and transparent ( I can see my desktop wallpaper through it). Nothing I try adds any content to the window. I don't have a clue except that maybe I have disabled a service that I am unaware that Resource Monitor requires.
I just thought I would give you guys a shout before I unnecessarily waste a bunch time and effort on something that isn't actually the problem and possibly make things worse for what might have otherwise had a simple and easy fix.