Driver req but unsure of m/board

Hello,
Due to virus problems I have installed a new version of Windows XP Professional on my dad's computer. I am not clued up on computers but I have been told I have to install the required drivers before I can do anything else. My dad has taken the side off the computer and given me the only information he can find on the motherboard. On one place it reads

ENCER model APX300W (which comes up with nothing if I google it)

and in another it says

CE0197X (which would appear to be something to do with Intel)

I am having to check this out on my own computer in the hope that I can download something to a disc, and install it on his. We do not live close and I don't have the computer at my house which is making it all much more hassle.

Can you help?