You should mention how you solved this so it helps others looking for answers. 
Hello all, I am really hoping that you can help me with this probably as it is very frustrating. I reinstalled Windows XP today, a task I have previously performed. I still have my Dell Resource CD, which I duly inserted. First, I installed the Chipset driver. Second, I sought to activate the network controller so as to get some internet going. In the list I found the driver for Intel PRO 10/100 Ethernet. I downloaded the driver to the default drivers folder, named R67150 and clicked Setup in the Win2k subfolder. I was given a message which said that the driver had successfully been completed. However, it appears that it was unsuccessful. When I go into Device Manager, under Other devices, I see a Yellow Question Mark an Exclamation Mark on top of it. I am really scratching my head here with no idea as to how to proceed. I know it's a dated Dell machine, hence why I was hoping to 'freshen it up' with a reinstallation. The network adapter had worked perfectly up until the reinstallation so I don't suspect that it was burned out / died. Please don't ignore this thread folks! Offer any information or input that you can think of! Kind regards, Robert
Dell Dimension 4600 - Reinstallation of XP - Network drivers (R67150) for Intel 
PRO 10/100 Ethernet will not work.