Hi Rick Walls,
What Graphics Card are you using, the 7870?
What error message did you get when you installed the earlier versions of the driver?
Have you ever got drivers to install correctly?
Is your Windows Operating System fully up to date?
Im also having a problem like this i got a new computer it has R9 390X graphics card 990FXA mother board and an amd FX-8320 Processor also have a 600watt power supply.and after installing the latest drivers when i restarted the computer right when i tried to load windows my screen goes black... this happens on windows 7 and 10. to fix the black screen i started windows in safe mode ( took forever) and restored to a point before installing the drivers and it fixs everything