I'm really getting frustrated now so hopefully somebody can help me :-|
On Monday I recieved my new amd64 3000+ and ABIT KV8 Pro mobo. I put it all in and got it up and running perfectly. Had a small game related problem to begin with that i fixed by resetting all the bios settings to default. Anyway, I connect to the internet via another computer's internet connection, over one connecting cable straight from my computer to the other. The network and internet worked perfectly immediatly after installing the new mobo and processor until... i switched off my computer on the Tuesday night as normal, and on the wednesday morning, it was showing limited or no connectivity and i wasn't able to connect to the other computer or the internet.
I've searched all over the net and tried everything! i've ran and installed the XP SP2 network fixes and reg fix, ran the netsh TCP stack fix, uninstalled SP2 on both computers, done a full norton anti-virus system scan, full spybot- S&D scan and swapped cables and network cards around. I've even reinstalled Windows and nothing has worked. Now i know it's something to do with my computer as the other one can connect to the modem through either of it's network cards.
The only thing i havn't done is reformatted my hard disk, which i don't want to do as i don't have a CD/RW in it anymore and so can't save files and info that will take well over 1-2 weeks to download again with my 300k connection.
The only thing i did on the Tuesday afternoon was flash the bios, in order to fix the game issue but i restarted it a few times and the network still worked.