Many thanks for that.
I have actually made one good machine out of two and did a new install using Windows XP (because I have all the disks and programs that run on it already but its not very respondant, thats why I figure it needs an updated motherboard.
Many thanks for your reply.
I think it may be better to do as you say and buy a combo.
The big question is how on earth do you select the correct one? There must be thousands out there. My first thought is Ebay because cost but no guarantee. I could take it to a PC World but they charge a fortune and if I do get the right one I can install it myself anyway.
Just to put you in the picture:-
Windows XP Professional V2002 Service pack 3
Pentium III 803 MHz
1.25 GB Ram
127 GB memory
12 GB used space