In the other post he says:
i have a compaq presario 4540
its not that old it has
16 mb ram Sad
233 mhz processor
maybe windows 95
That makes it an AMD K6 MMX 233 MHz
It's not worth the time, effort or money to keep that thing going, unless he just wants to learn about older computers.
I've worked on those. when Compaq was Compaq, not HP. The BIOS in those is just awful, sometimes impossible to access.