This Realtek AC97 Audio Driver for works on Windows 10 64bit this is WHQL version that is distributed by Microsoft, and is also available through Windows Updates, which should be your first option if you are needing to install the sound drivers. The current version is 6.0.1.6305, this signed driver covers Window Vista, 7,8, 8.1 this driver was last updated in 2009, long before Windows 10 even came out but it is still used, for newer versions of the Realtek Audio Driver for Windows 10 64 bit follow the link.