Hi! First of all sorry for my bad english! I have two problems with my soundcard under Win 8.1 Pro. 1. No illuminative leds (buttons) on the first panel of the soundcard. I use game mode and CMSS-3D mode but no visual feedback. Everything is dark. 2. Audio Control Panel problem. When I select on the Headphone Detection tab and I select "Automatically Enable headphone settings" and "Automatically Mute Speakers" the choosen options disappeared after a system restart or power off/on. Under Win 7/8 works everythin fine.