The Windows 7 Mobility Center exe file is located at C:\Windows\System32\mblctr.exe. And it is only available on laptops and tablet PCs. Also it can be enabled on desktop computers.
How to open Windows 7 Mobility Center:
Click start button, select the Control Panel in All Items view. And click on the Windows Mobility Center icon. Double-click it to open Windows 7 Mobility Center and adjust the settings per tile to what you like.