Windows 10: How do I fix windows defender crashing?

Hello, I've recently been infected with some kind of virus. When I checked the virus defender it said "TrojanowerShell/CoinStealer.RP!MTB" or something along those lines. I've clicked on start action but the defender just crashed it would also crash when I clicked on protection history, I've launched windows in safe mode and put most of my files on a portable drive and after that plugged out the portable drive, enabled the internet, and downloaded malwarebytes. From then on I deleted the about 20 viruses malwarebytes said I have, I'm still on the malwarebytes free trial so Im worried when

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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?

 

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.

 

GPU-Z 0.8.7 crash on launch

W1zzard is asking you to test so that he can suggest next steps and be able to troubleshoot the issue you have.
If another version works, it would be one set of steps.
If several other versions also fail/crash, then it would be another.