Citra on Windows 8.1

Hi
installed Citra on my Macbook Pro mid 2012 with Windows 8.1 but its so slow, low FPS and speed. I also installed it on the same pc but with Windows 10 and it was perfect. Why?
Thank you!

System Information

  • Operating System: Windows 8.1
  • CPU:Intel core i5
  • GPU: Intel HD Graphics 4000
  • Citra Version (found in title bar): Citra Nightly #781
  • Game: New Super Mario Bros 2

Diagnostic Log
No text in log

In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.

I would make sure that, on your Windows 8.1 installation, you have the latest graphics driver from Intel.

I installed 15.33 drivers for my Intel HD Graphics 4000, aren’t they the latest?
Btw, I’ll search.
Thank you!