Frankly, you need to get a spare tire for that car too.
This isn't going to go far.
If you didn't understand the analogy, it's this. Without a Windows 98 CD or the CDs that came with the system, repair is uncertain and most likely impossible.
Getting an error code says windows performed an illegal operation when windows 98 loads on my emachine 633is. I think it is out of memeory. How can I get it running? I don't have any disks it was and hand me down computer.