Universal Plug-n-Play has been a nightmare of a vulnerable and useless service running by default on Windows XP systems. Patches have come and gone, but still, this service, coupled with SSDP, are simply useless and volunteer far too much information for prying eyes as they readily display the OS of a target machine to a hostile probe. Turning off the SSDP service in Windows XP also turns off the UPnP service as well, and should be part of a base install configuration set. NIST standards include this disabling of SSDP as part of their XP procedures.