SDMCP.exe is Stardocks desktopX which allows you to customize your windows desktop. More information on stardock products can be found here. DesktopX specific information can be found here.

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DesktopX is a multi-faceted Windows desktop enhancer that allows significant enhancement to the Windows experience by allowing users to completely customize the look, feel, and function of the desktop.

DesktopX enhances Windows by enabling users to replace or enhance their Windows icons with DesktopX objects, add new functionality to their desktop (clocks, calendars, stock tickers, media players, resource monitors, etc.) by adding mini-applets called widgets. Or they can replace their entire desktop at once by downloading DesktopX "themes" that can totally alter the existing Windows desktop.