My main desktop machine did two uncommanded reboots while working on stuff today. On a hunch I pulled it out from under the desk and to my (not) surprise, the radiator (liquid cooled) was completely blocked with dust. Gave it a good blow-down / vacuum and now it’s running about 10*C cooler than it was earlier, even when I work it hard.

I guess if you can’t remember the last time you cleaned your ‘puter, it’s too long ago.

RBS