I have 2 domain controllers both 2008 R2. One is the Primary and other the Secondary. The Primary Server hands out DHCP addresses to all computers with Windows 7 Pro. Here's the problem:::: For that last 2 weeks periodically I have been having different users not able to access certain mapped drives or Internet. I checked out the IP address they are receiving and for some reason when running the IPCONFIG /ALL I see a Windows 7 Pro computer as the DHCP server. Most of the time I can release and renew the IP address at that workstation and then it shows the correct dhcp server and then all functions work properly. I removed that Windows 7 Pro computer from domain that is showing as the dhcp server and even staticed the ip address and it still delegates out. does anyone have any clue why? I verified all the network settings on that Windows 7 Pro computer and it is configured like all the other workstations?