Friends, need help with crashing PC, any diagnostic ideas?

I've got one all-in-one HP PC, it crashes randomly: sometimes after 15 minutes, sometimes after hours. Crashes are either complete freezes, or reboots. Data surely gets corrupted when that happens.

It's a Windows box, event log contain no details, except about abnormal restart being detected after it happened.

CPU, Memory, SSD?

#asknostr 

 check the fans.  cooling could be struggling.  causing overheat and shit down.  variable power usage would explain the random freeze times 

 aah, maybe, it has stayed in a dusty basement for about a year 

 Sounds like overheating. Had the same with dell laptop. Dell service replaced the motherboard eventually. 

 could be, I'll check it out 

 Yah, 92, fans howling, not very hot air coming out of one side of fans, no air from the other. Looks like a good hint so far.
https://m.primal.net/MCTz.png