DNS Client Service - DNSRSLVR.DLL
Dnsrslvr.dll is a service provided by Microsoft as part of your Windows operating system. It resolves and caches Domain Name System (DNS) names for this computer. If this service is stopped, this computer will not be able to resolve DNS names and locate Active Directory domain controllers. If this service is disabled, this service won't be able to find names in the cache and will have to look elsewhere. This could result in system slowness. By default, this service will be set to "automatic". We'd recommend leaving it that way.

A description of services that run under svchost in Windows XP can be found at http://support.microsoft.com/default.aspx?scid=kb;en-us;314056.

A description of default services running under Winodws can be found at http://support.microsoft.com/default.aspx?scid=kb;en-us;Q250320.

Service

Microsoft