Recently, most of the 40 or so pc's on my network began displaying "A duplicate name exists on the network" upon booting up. I am 100% sure that no duplicate names do in fact exist. I am running W2k server w/ DHCP & DNS. However, WINS is not an installed service, so I don't believe that is the problem. The most perplexing thing is that no configurations changed before this started. Most of our functionality is there, but a few of the mapped drives, and viewing network resources are not working. Any help is greatly appreciated.