The PnP-X IP Bus Enumerator (IPBusEnum) service manages the virtual network bus. It discovers network-connected devices by using SSDP or the WS-Discovery protocol and gives them presence in Plug and Play. If this service is stopped or disabled, presence of network-connected devices is not maintained in Plug and Play, and all Plug and Play scenarios stop functioning.

This service is installed by default in Windows 7, and the service startup type is Manual. In Windows Server 2008 R2, this service is installed, but disabled.

When the PnP-X IP Bus Enumerator is started in its default configuration, it logs on by using the Local System account.

The PnP-X IP Bus Enumerator service is dependent upon the following system components:

• Function Discovery Provider Host
• HTTP
• Remote Procedure Call (RPC)
• DCOM Server Process Launcher
• RPC Endpoint Mapper

The following system component is dependent upon the PnP-X IP Bus Enumerator service:

• Media Center Extender Service