I am not a tech person, but I cleaned out my secondhand PC today, and it took hours with the sheer amount of dust accumulation. The fans were nearly overloaded with it!!
Does a clean PC run better / faster than one filled with dust? Or is it more a matter of keeping the fans running easily? Or something else…? Idk, maybe I imagined it, but it seemed to boot much faster after cleaning. Could be wishful thinking!
Pentium III, win7?! Do those motherboards even accept enough memory for what post vista OS slurps?
Listen, that computer was manhandled and abused for almost two decades. You’d be shocked by the weird things they got it to do. Part of the hazard was all the Chinese “upgrades” it got over time.