ok, we had a very odd problem today...all of a sudden, no dhcp leases were being handed out by either of our domain controllers. a static ip would work fine, but any requests for new dynamic ip's were just not going through. stopped and restarted dhcp service on both dc's, still no dice. then i noticed that event viewer contained multiple entries (over a period of months) where a user's laptop was announcing itself as a 'master browser'. as soon as i asked that user to shut down, dhcp was back up and leasing ip's. as far as i understand, the browser service (and servers) are for locating resources on the network. so, if the laptop won the election for domain browser and was acting as a domain browser, would that be a cause for dhcp failures? thanks!