The first step is to disconnect all peripherals. If your computer does not hang after disconnecting the peripherals, one of them might be responsible for this issue. In this case, updating or ...
CPU failure is usually sudden and total, but there can be signs that suggest it would be prudent to start saving for a new ...
That being said, random lock-ups when when all of your other diagnostics are fine always make me suspicious of the PSU, as someone has already mentioned. It's just a gut instinct, but I've seen it so ...