Windows 7 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.
Discovers networked devices and services that use the SSDP discovery protocol, such as UPnP devices. Also announces SSDP devices and services running on the local computer.
Consequences of Stopping:
If this service is stopped, SSDP-based devices will not be discovered. If this service is disabled, any services that explicitly depend on it will fail to start.
All services listed in 'Required For' will be unable to function
Windows Media Player Network Sharing Service, Media Center Extender Service, UPnP Device Host