Win 8.1 Pro Preview 32-bit installed in a Dell laptop which used to run Vista 32-bit. It was a clean install. Every works real good EXCEPT no sound. I went and install Realtek HD Audio Codecs Driver 2.71. It shows in Programs and Features as being installed. Cannot find it under Device Manager nor in Control Panel. In short : still no sound. Help. P.S. I also install Win 8.1 into VMware Player using a newer laptop running Win 7 Home Premium. This install has sound but light years slower than the one installed in the old Dell laptop.