Windows 10: How to stop random crashes?

My computer crashes randomly when I do any task. When it crashes, my screen goes black and a loud screeching noise comes out of my head phones. It also doesn't shut down on its own, and seems to do this forever. So I'm forced to hard shut it down. I've reinstalled windows multiple times. I've also used sfc/scannow which said it had repaired the corrupted files yet my pc still crashes. I also have windows updated and use current amd drivers. Any help would be appreciated.

:)

 

Firefox crashes non-stop!!!

Suggest any methods to stop Firefox from crashing. It crashes right after starting, no more than a second or 3..

Any cache, plugins, antivirus things that might cause it? It is very, very annoying...

 

all games crash!

ive watch my temps and both the cpu and gpu are within normal ranges. when it freezes it simply freezes the image and stops the sound. i must reboot to get back to windows.

 

all games crash!

I suggest you run rthdribl > http://www.daionet.gr.jp/~masa/archives/rthdribl_1_2.zip
Increase the window size step by step and watch your vga temps permanently.
What happens?
If it crashes, run at stock speeds as suggested before and retry.

P.S.: When your system locks, does the display signal turn off after a time?
Stuttering sound or no sound at all when freezing?
What X1800XT model do you own exactly?