In most cases, these are minor and the trade-off of using the Realtek HD Audio Driver versus the ones that come pre-installed is having a more stable, and sometimes more customizable audio experience. Whether or not the manufacturer of the laptop or desktop provide their own drivers, Realtek's drivers will generally work fine but without the customizations that are provided with the original software. The Realtek HD Audio Drivers are official installation files for computers containing audio chipsets by Realtek.
