Windows Vista Service Details
Enables devices that use SSDP, which is for UPnP. If you have UPnP (separate from PnP) devices, they may stop working. If so, set it back to manual.
Enables discovery of UPnP devices on your home network.
Consequences of Stopping:
All services listed in 'Required For' will be unable to function
Windows Media Player Network Sharing Service, Windows Media Center Extender Service, UPnP Device Host