Windows Mobility Center (mblctr.exe) is a special app that comes bundled with Windows 10. It is present by default on mobile devices like laptops and tablets. It allows changing brightness, volume, power plans, screen orientation, display projection, Sync Center settings, and presentation settings of your device. By default, the ability to run the app is restricted to mobile devices only. It doesn't start on desktop PCs. Here is how to unlock it on a Desktop PC.