Our company has 2 offices. One has an active directory domain, the other has no server and is set up on a workgroup. There are some users with laptops that work out of both offices. One of them started having problems with the workgroup. For the first 2 months or so everything worked fine for him. Then, he couldn't access the internet through the wired LAN. In fact, whenever he plugs into the network, it kicks everyone else off. The problem seems to be that he is not able to aquire an IP via DHCP and the laptop is trying to use a 169 block APIP. There is also a wireless network (same firewall) that does assign an IP and he can access the internet on that. The main problem is that it is a guest network and he can't use the printer while he's on it. He has no problem on the network in our other office so I don't think it's a NIC problem. I have tried different cables and tried signing him on with the local account instead of the domain account. He's using a Lenovo Thinkpad running XP Pro. Thanks in advance for any help.