It's likely maybe - cos you have another Firewall - besides the
Windows one - I get this if I set my firewall protection too high -
though it only seems to effect Microsoft update site - set at this
level it protects external sites from determining what your operating
system is, or what Browser your using...
and results in this msg, or similar. If you Do have another Firewall
-check it's settings.
If not ~ :) then it's something else! :) obviously.