PC freezes without restarting, where to look for the problem?

Question

Iron

PC with freshly reinstalled WinXP.
License, everything.
The PC started to freeze. It works and hop: everything freezes on the screen, the mouse and keyboard do not respond. But the PC itself does not reboot.
PC 6-7 years old
HDD smart in good condition. I changed the operative (but I'll check it with a test).
What is the problem to look for?
Solution: PSU replacement

Answer 1

Look at the capacitors, including the power supply.
To climb into the power supply, you need to have engineering training. Without it, the power supply can only be replaced with a known good one.

Answer 2

Watch the OS logs, especially pay attention to the events (errors and warnings) that occur right before the freeze. Read carefully, think...

Answer 3

Very similar to overheating. See if the temperature is too high. After blowing, it often happens that it doesn’t blow out, but gathers into a ball and the fan wedges, pay attention to this

Answer 4

Perform a clean boot . Problem still exists?