I have just lately upgraded from Windows XP 32bit to Windows 7 64bit, I am now getting this difficulty as I observe many others have gotten also. Previously my sound was working completely although when I downloaded the Windows 7 64bit edition of Realtec Audio Driver/Manager the whole interface was new and when I sprint the Speaker Test it outputs sound in all speakers, But when I try play music/games the sound is only 2.1, I have managed to obtain sound on the rear / center speakers but only on poor quality by setting unwanted settings, for instance Sound Environment, Speaker Fill etc.

I am operating driver version '6.0.1.5485', I have noticed people on Win XP just reverting to an older driver edition. I don't believe that is quite possible for Win 7, has anyone solved the trouble on Vista/Windows 7?