I had a problem the other day with my Xbox Music, everytime I tried to sign in it kept saying your PC is currently offline. I was definitely connect to the internet as I could browse the web and emails still appeared in my inbox.
Having surfed for a solution, and trying different things I was still no further. This message and the refusal to sign in was starting to get annoying. I noticed also that other apps started to play up like Xbox Video, Game and any time I tried to sign in to an account using https with the Metro (modern) version of IE I was getting page not displayed.
I did find a solution in the end and now Xbox Music and the other apps are working again. What had happened is the SSL was unticked in the internet options, I’m guessing this was done with an update as I never unticked them. So if you are having the same problem try this…
That should solve the problem.