Welcome to Microsoft Answers Forum. You can change the speed at which files play in the Player. For example, you can slow down the playback speed if you're taking notes while watching a training video, or you can speed up the slow sections of a presentation.
1. Play a file, and then switch to Now Playing mode. If you’re in the Player Library, click the Switch to Now Playing buttonin the lower-right corner of the Player.
2. Right-click an open space in the Player (such as to the left of the Stop button) , point to Enhancements, and then click Play speed settings.
3. Move the Play Speed slider to the speed at which you want to play the file, or click the Slow, Normal, or Fast links. To select speeds between the labeled play speeds, in the Play speed settings dialog box, clear the Snap slider to common speeds check box.
4.To hide the settings, click the Close buttonin the Play speed settings dialog box. Additional Information: http://windows.microsoft.com/en-US/windows7/Change-playback-speed-in-Windows-Media-Player