I recently updated my audio driver from the default built in Windows 8.1 device driver to use the Realtek audio driver and it also installed the Realtek HD Audio Manager. It's a nice bit of software that allows you configure all things audio.
However, as soon as I installed it I noticed that, when I plugged my headphones in, the volume was deafening. This was because the volume slider in the system tray was being shared between headphones and speakers. Previously when I plugged the headphones in, it muted the speakers and switched over to my headphones at around 15% volume.
Now when I plug my headphones it it's at 100% still, which is what the speakers were at, needless to say it's a bit of a shock every time.
I found out however that there is a solution. If you start the Realtek HD Audio Manager, there's usually an icon in the system tray, you can go to "Device advanced settings" in the top right corner and choose …