Hi there
Sky GO seems to have problem with IE 10 and W8 RP.

However if you set the sky sites all to COMPABILITY Mode in the browser tools it works again

note however -- you'll probably need to Update to the latest release of Sliverlight.

You can get either the small window or Full Screen

The POPOUT doesn't work even if you allow popouts from the sky go site as suggested in the FAQ

however I can still get my "Footie" Full screen so I'm not too bothered.