Hard Drive Crapped Out Its Built Into The Motherboard

Recently my hard drive crapped out on me so I had to take my external hd and use the as my internal hd.... everything worked as far as installing windows xp etc. I have a cable modem with a wireless router (which works because I'm on the laptop now), so I figured I'd hop on the internet and download some drivers etc... Well here lies the problem, computer isn't picking up the internet and when I used my ISP's cd, the cd told me that i didn't have a network adapter... I do have a network adapter; it's built into the motherboard. I downloaded a driver from intel and burned the *.exe onto a cd and ran it in hopes that it would work.