Download DHCPFixTool1.2.zip and follow the instructions. Note that the tool needs to be run as administrator (right click to run as administrator). After the tool has fixed the appropriate adapter, reboot the machine and it should be able to successfully lease an IP.
Below is a link to Microsoft's web site. PLEASE DO
NOT MODIFY THE REGISTRY BEFORE BACKING IT UP. IF YOU DO NOT FEEL COMFORTABLE
EDITING THE REGISTRY, PLEASE SPEAK TO YOU POINT OF CONTACT
PERSON.