You can find the driver on the official web page of Realtek. The available drivers are for Windows 8, Windows 7, Windows Vista and Windows XP platforms. Once you download the driver, press Windows + Pause/Break key combination and open Device Manager. Expand the Sound, video and game controllers list, right-click on your sound driver and press Update Driver Software. Use the Browse option to navigate to the downloaded package, select it and install it following the on-screen instructions.
