I have a N56VZ notebook with i7 processor and nvidia GT 650M graphics card. I didn't have any performance issues with Windows 8, everything was working perfectly. After the 8.1 update, I got low fps with most of the games. I've almost tried everything, changing the drivers, disabling sound card, stuttering mouse fix, uninstalling some of the programs that occupies cpu etc. but no luck. I had to downgrade to windows 8 back again. There are no problems right now.

Is there any way to fix this or update/fix planned to fix this problem? I don't even understand what caused this.

Hi, 

According to your description, this issue can be caused by incompatible drivers or software.

Since Windows 8.1 was just released for a couple of weeks, we'd better to wait for some compatible drivers and update packages for your game from manufacturers.

Thanks for your understandings.