I get this error when trying to sign in to Batman: Arkham City. The game is a steam version, I am on Windows 7 64-bit and the game was signing in perfectly fine in my non-Steam version of the game, now it cannot sign in to live (always stuck in offline mode) and my 40+ hour online save is locked up. No amount of googling has helped. Let me stress that the game WAS WORKING prior to switching to Steam, so please help fix this. I know you probably can't help decrypt saves so that after the (now inevitable) shutting down of GFWL services us customers can still access our games and achievements but at least signing in should not be a problem!