Yesterday i bought a new motherboard MSI G41M-P26 and i reinstalled windows because of this problem (im using win8 release preview) i installed Realtek (everything went fine) and i restarted my pc, after that i couldn't find the realtek icon anywhere, even on the program files the realtek folder is empty there are only 2 files (RtlUpd.exe can't even run it, and USetup.iss) the HDA folder is empty also. I reinstalled it many times, tried various versions of Realtek, it's not even on the Task Manager. It seems like it's installed but i can't run it. I have everything up to date, Please help me, it's really important for me to use realtek.
PS : i have the sound in case you were wondering. But i need realtek. It has so many good options and i'm using a 5.1 home theater.
I didn't have this problem with my old motherboard, and it was also MSI.
Sorry for my bad english.