This is a Windows system installed file with Windows File Protection (WFP) enabled.
There are 40 versions of wmpshell.dll in the wild, the latest version being 9.00.00.4503. The average file size is about 97.01 KB.
Windows Media Player (abbreviated WMP) is a media player and media library application developed by Microsoft that is used for playing audio, video and viewing images on personal computers running the Microsoft Windows operating system, as well as on Pocket PC and Windows Mobile-based devices.
(Note, the behaviors below are for all versions of wmpshell.dll, select a unique version for details.)
Located in the registry at 'SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved'
United States installs about 61.42% of Windows Media Player Launcher.