Most Windows machines come installed with Realtek HD Audio Manager or driver. Uninstall and then Reinstall Realtek Driver And if you are one of those who recently found it missing on your Windows system, there’s a simple fix for that: download and reinstall Realtek HD Audio Manager on your Windows. However, it is just like other programs that sometimes face issues. It also has a bunch of features that music lovers would find useful every single time, from noise suppression and acoustic echo cancellation to a sound recorder and more. Even more, it automatically detects the newly added audio accessories, making audio setups more convenient for you. Realtek HD Audio Manager is a handy way to control and make quick tweaks on your audio adapters without much effort.