I cannot do anything in the Autocad or Autocad LT, 2018 or 2019 drawing area.  I can right click and see menus, I can see dynamic input, and I can see the command line and all the toolbars.

I cannot see my cursor or viewcube or existing linework or created linework, it is just black, modelspace and paperspace act the same. 

I am not a Mac user, so I don't know where to check what.  I have tried the various AKN articles, some describe secondary monitor issues, some say reset to defaults, I've reset to default, and I only have one screen, so neither of those options work.  Im 100% positive it is a graphics related issue, but being a windows user, I have no clue where to start.  Any help would be greatly appreciated.