SSDPSRV.exe
(Microsoft)
Part of Windows Millennium Edition. This program only gets installed if you choose to install the "Universal Plug and Play" sub-component of the Communications component in "Add/Remove Programs \ Windows Setup". SSDPSRV provides Simple Service Discovery Protocol (SSDP) and General Event Notification Architecture (GENA) services for the Universal Plug and Play functionality and is a component designed for the future generation of Plug and Play devices.
Recommendation :
If you are using standard Plug and Play devices, you do not need this program. You can de-install it by un-selecting "Universal Plug and Play" in "Add/Remove Programs \ Windows Setup tab \ Communications".