While watching a movie, the volume goes up or down frequently. Sudden volume increment may hurt your ear, and if you have a heart disease, then it is a serious problem for you. But Windows does not have any built-in option to get rid of this issue. So you have to rely on third party application.
Sound Lock is one of the best tools when it comes to controlling your maximum volume on Windows. With Sound Lock, you can limit the sound output of your system per channel. The best thing about sound lock is that it can limit the volume of each of your output devices. Using sound lock is very easy, after installing the application just turn on. And set the limit by dragging the limit ranger up or down. On the right upper corner, you will see the preference button.