When you need to play a video on your computer but you do not know where to look, remember that Microsoft Windows has a built-in video player called Windows Media Player. To access Windows Media Player, go through the "Start" menu. The "Start" menu conveniently lists all of the programs installed on your computer.
Click the "Start" button in the bottom left-hand corner of the screen.
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Click "All Programs."
Click on "Windows Media Player" to open Windows Media Player. To play a file inside Windows Media Player, right-click the top of Windows Media Player's screen. Click "File," then "Open." In the window that appears, double-click a video file to open it.