| It's not super clear, but I'm assuming the affected machine is wired, since you said you swapped the cable. If that's the case, there are only a few things it can be considering the other machines are working fine and you've tried different ports on the router.
To start off, see if you're getting a link light on your machine and on the router. Just look at the port on the back of the machine where the cable plugs in, it should have a little light by it. If you don't have lights, report back on here.
Next, click on the start button, go to run, type cmd. In the command box type ipconfig and hit enter. I'm assuming this will show a 169.x.x.x address, this is what it gets when it doesn't get an address via dhcp from the router. You can try ipconfig /release, then ipconfig /renew and see if it gets an address.
The next step would be to uninstall the network card through device manager. Right click on the my computer icon and go to properties. Click on the hardware tab, then device manager. Look down the list til you see network adapters, double click that. Right click on the one that is your network adapter and hit uninstall. close all the boxes and reboot the machine. If you still don't get an address, there is a possibility that your network card is bad, which is actually a pretty easy fix.  |