The DNS Client service (dnscache) caches Domain Name System (DNS) names and registers the full computer name for this computer. If the service is stopped, DNS names will continue to be resolved. However, the results of DNS name queries will not be cached and the computer's name will not be registered. If the service is disabled, any services that explicitly depend on it will fail to start.
If you attempt to "repair" your network connection and a dialog box complains that the "DNS resolver failed to flush the cache," this service is the reason.
Default Vista Home Basic: Automatic (Started)
Default Vista Home Premium: Automatic (Started)
Default Vista Business: Automatic (Started)
Default Vista Ultimate: Automatic (Started)
Safe Setting: Automatic
Service Name (registry): Dnscache
Display Name: DNS Client
C:\Windows\system32\svchost.exe -k NetworkService
Account: Network Service
What service DNS Client needs to function properly:
What other service require DNS Client to function properly: