Well UPnP error does not matter and I would turn it off. Some other device may try to grab 80 and 443. As long as you corectly forwarded 80 and 443 you should be fine. I thing the site not available may be tied to the password quizzer.
Look at this thread in the MS group and see if it sheds any light.
As well from afar, you might try to access port 80 using IP. You will get a cert error, but at least you know your forwarding is correct.
