I have just downloaded and installed the new Windows 10 build, and cannot get 5.1 surround sound to work. Before this update I was unable to play the test tone for DTS Interactive. I now can play the test tone, but only 2 of my speakers actually play their tones, so 5.1 is still not working.

I just tried installing what I think is the latest driver from Realtek, Version 6.01.7541. Would this be the latest version?

Am I doing something wrong, or has this well known issue still not been fixed? I am aware this issue was identified as a Microsoft bug and the rumour was that the new build (10586) was going to fix it...