my girlfriends mum has a really old PC
I think it started life as a 386, and has been upgraded to a 486 in the past.

Its a compaq (I think) desktop, with 8mb RAM and 5¼in and 3½in disk drives. It is running under Windows 3.1. My g/fs mum is thinking about swapping the 5¼in drive for a CDROM.

Does anyone have any suggestions whatsoever about upgrading such an old machine? What am I likely to find inside the case? Will a switch from the floppy drive to a CD-rom go smoothly? Is the memory sufficient?

I haven't opened it up yet, so I know very little about it. Any advice whatsoever would be appreciated.

Thanks