Windows 10: Windows crashing every morning after a few minutes

This has started happening since last 1 week. I don't recollect installing any new programs that could have initiated this. After starting my PC for the first time in the day, it keeps crashing after a few minutes. Sometimes, it happens multiple times in a day within few minutes of each other. But it starts functioning fine once it has crashed a couple of times and I've restarted it. I'm not sure what is causing this. I have updated my NVIDIA drivers. I have also tried to quit most of the startup programs to isolate the issue, but not sure. The system doesn't restart after crashing. The screen

:)

 

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.

 

Add-Ons for Firefox crash since update to 80

I left Firefox open over night and attempted to login to LastPass this morning - all the addons crashed. I had Firefox Task Manager open at the time and before attempting the login all addons were in the list and not using very much resources. After attempting login, all of the addons disappeared from the Firefox Task Manager list.

I will try the additional suggestions.

If I want to try a new profile without losing my saved/sync profile (and hopefully with the option of syncing my data back into the new profile) what steps should I take? Or is it just a given that if it is profile corruption, the sync profile is junk...?

Thanks!