The 566 MHz Celron PC that I setup in year 2000 is still good and running. The only problem was it got very hot after prolong usage. It occasionally hung for unknown reasons. I was guessing it is due to overheat. I changed its power supply with a 450W Blossom power supply. The new power supply has a much stronger fan. The old PC casing is no longer as hot as before installing the new power supply.
At the same time, I installed a USB 2.0 PCI card with 4 USB port in the PC. And I bought a new Logitech black keyboard for it.
My old PC is now running like a brand new power horse. He he.