The Computer Browser service looks around your network to gather information on available workgroups or domains, computers and other networked equipment that supports the NetBIOS protocol. If you like to browse to shares or printers on other computers using the Network window (formerly Network Neighborhood), then you’ll want to keep this on automatic, otherwise, you can probably disable it. If your network consists of one computer connected to the internet, then you can safely disable this service with no loss of functionality.