Those are the newest error strangely enough. I'll look at the graphics and sound.

Errorlog.txt:
[2022-12-28 16:46:27 PM; 6.2.9200; 1920x1200x32(0); SC3: WWII World at War v1.15.00] FAILED(on_left_button_down):
[2022-12-28 20:20:33 PM; 6.2.9200; 1920x1200x32(0); SC3: WWII World at War v1.15.00] FAILED(on_left_button_down):
[2022-12-28 21:18:27 PM; 6.2.9200; 1920x1200x32(0); SC3 ...

Happens when I click on unit (very useful ...)
I hibernate the PC a lot so the game runs from 1939 to early 1942 over a week with a couple of turns each day until crash.
Are there any log files I should look at for the game, I've attached Dxdiag if that helps.
Autosave game looks OK, previously in ...

I was a bit surprised that when I chose winter war as Soviet, nothing happened, maybe I was supposed to DoW myself? I got the winter equipment decision.
Also is there a list of events somewhere so I can see if I need to DoW myself or there is an event, for example Operation Torch.

With best noob ...

Yeah I can see how mobility would help Japan here, do you upgrade all or just a select few as the cost would sky-rocket?

As my eyes are getting older it would be great if Bill/Hubert would shade the hexes for triggering the Soviet mobilisation hexes from Warsaw.

My old tired eyes find it hard to work out exactly the 10 hexes from Warsaw these days :) So I keep getting caught out and giving Uncle Joe a mobilisation ...

Hmm and how did you do it? (beginner player here sitting in the eastern mountains still)

When I'm going through my units (next unit button) and using the "sleep tool" and click space I sometimes get this.

Sometimes I misclick and the get left button menu.