The Computer Browser service maintains a list of computer names that are on the network and supplies this list to clients. The service assists in the name resolution process and is used for non-Active Directory enabled networks and backward compatibility with client computers that are running Windows NT 4.0. If this service is stopped clients in non-Active Directory enabled networks and Windows NT 4.0 clients may not be able to reach computers by name.
A service can stop for many reasons, including:
The service was stopped by an Administrator.
The service encountered an exception that stopped the service.
The service was improperly configured, which prevented it from starting.
The service was prevented from starting because the user account assigned to the service could not be authenticated.
The service can be restarted using the Services snap-in which can be accessed through the Computer Management console task:
Start Computer Management Console