Umm.. all computers have UPNP.. It's a windows service.. it should be on by default.. It is what allows programs like utorrent to open and close ports on your router (ones that support upnp) and windows firewell without you having to touch anything.
so no they shouldn't be blocked...
You could put your PC in the router DMZ (you lose ALL protection from the router) and see if your ports still mysteriously close too.. In which case it is either something you have to hash out with your PC, or your ISP
so no they shouldn't be blocked...
You could put your PC in the router DMZ (you lose ALL protection from the router) and see if your ports still mysteriously close too.. In which case it is either something you have to hash out with your PC, or your ISP