Last night I also can play online games but my computer which is running windows 8 64 bit, encountered a weirder thing suddenly. Then I've tried many ways to fix it and end of restoring windows 8 from a backup. my machine boots up two minutes later and displays a light blue screen with only a small water mark in thre bottom right corner which states "Windows 8 Ultimate, This copy of Windows is not Genuine."
There was no start menu or any Icons. And there was no programs I can run to restart my pc.
any help in this win 8 case? many thanks in advance.