>Also, is there any problem with upgrading to the full 256M RAM with only 128K of cache??
It will most likely slow it down. 128 Mbytes might also be too much. 64 MBytes would definitely help speed things up. Research Compaq’s web site for a definitive answer. They may have the info… if you look hard. Also, you may have problems with mismatched SIMM modules. A local computer shop might have some old memory for minimal amount.
I doubt that you have an overheating problem. Is the CPU fan spinning? …If it has one? You would probably have other problems, as well.
To determine what startup programs are running click Start, Run, and enter msconfig. Also, check for unneeded stuff in the config.sys and autoexec.bat files. There may be throwbacks to Win 95? Unless you have some old DOS programs/drivers, Win 98SE will run without either of those files. Try it. You can turn them back on.
Try defragging the drive (Start, Programs, Accessories, System Tools…)
Check Start, Control, Panel, System, Device Manager for exclamation marks/interrupt conflicts. I would not put any money into the computer. Larry