I've been dealing with this issue for the last two days. None of the Xbox Games through the Windows App Store will log in to Xbox live. The Xbox Games app has no problems doing so. All seems to be working fine for the music app and the video app. I just can't get any of the games to sing in. I've tried every possible suggestion I could find short of reloading my Surface. I've tried the proxy settings fix (ensuring the Surface is not configured to use a proxy server), I've tried the time zone fix (ensuring the time zone matches my actual time zone). I've ensured that I am logging into the system with my Windows account rather than a local account... I've switched accounts in the Windows App Store, uninstalled and reinstalled games, and even installed Xbox games that I've never had installed on any of my devices. These are all fixes that other people have reported as working in the past in various other forums and on Microsoft's help sites and I've had no luck with any of them. Is anyone else having a similar problem and has anyone had a similar problem in the past that they were able to fix? Thanks.