All but one computer in a network is working...?

Question

I have tried restarting the modem and the router both, I also tried restarting the computer. There are 3 computers hooked up to this network, of which 2 are working. I cannot figure out how to fix the computer with the problem and the computer is very important for work and banking.

Answer 1

Make sure this 3rd computer is getting an automatic IP address.

Right click my computer and see the workgroup. If in vista, you need to click the computer name tab. All computers need to be on the same workgroup name.

Answer 2

can this computer connect to the tow other but not the internet , or it cannot connect to non al all?

what are the ip address of the 3 computers? maybe the 2 that are working is getting their ip automatically (through DHCP) and the third has a static ip that is wrong one?

please give more details

Answer 3

Could it be that your hard drive is having troubles retaining information and it accidentally erased your network ID?