Over a few weeks I've been aware that a fan on/inside my fairly bog standard HP desktop was working overtime.
This morning, before turning it on I thought I'd have a look/see inside. Disconnected it, on side on desk and removed the cover.
Heatsink on the processor was absolutely clogged with dust. Blew some out with compressed air and then cleaned thoroughly with a paintbrush - static precautions in place of course.
Vacuum cleaner with crevice tube attached used to suck up the detritus.
Video card was similar. Nasty sharp edges on that - plaster on finger now!!
Case fan and that for PSU were also cleaned.
Had the thing since 2017 used daily for personal stuff and, for an extended period from 2019 on for work.
Not the first time I've gone through this routine but clearly I've neglected something I should do at least annually.
Do others, particularly those with a professional IT background have a routine for this?