I am running XP, i use sygate, and a linksys router. The only port open on my computer is TCP port 135, i have no UDP ports open. I have gone into services.msc and disabled all the services i dont want to use, including UPnP(Universal Plug'n play), i also use xp-antispy and have the option enabled that shuts down this service, and i use the "unplug'n pray" from grc.com,(which is redundant i know). But i have checked in services.msc and it is disabled for sure.

This is what troubles me, when i go to http://scan.sygatetech.com/ and run all of the scanning options i get a complete stealth response across the board,however, when i run the UDP scan i get this response: "We have determined that you do not have any firewall blocking UDP ports!".
For all of the ports scanned in the UDP scan i get a closed result, except one: UPnP. Is this sygate being misleading? or is there something i am missing, because it sure seems suspicious.

I have also run the scan at https://grc.com/x/ne.dll?bh0bkyd2 and i get a stealthed response on UPnP.