Is it possible to find the windows 98 serial/product code within the os,
I have found in the windows folder (help) the end user licence agreement but not the code/serial itself?

I've used Magic Jellybean for XP; I assume it'll work for other windows OSs as well. (I think you can find this software in the free programs forum as well).

I use SIW which provides more information on you system than any others.
Very small footprint on a system. Is only active when one activates it.

Some like Belarc. Although it's simplistic and problematic sometimes.

Majic Jelly Bean Keyfinder version 1.51 will work on a Win 98se computer

try it and see?