1. Click Start>Run>type gpedit.msc and click OK.
2.Navigate to this line:

User Configuration >> Administrative Templates >> System >> Ctrl+Alt+Delete Options >> Remove Task Manager

3.Double-click the Remove Task Manager option.
4.Set the policy to “Not Configured”.

1 Start a movie in any player.

2 Then open Paint.

3 Now, in the player when the movie is being played, press "Print screen" button on your key board.

4 Now, Press Paste(ctrl+v) in Paint.

5 Leave the movie player open and don't minimize it.

6 Open Paint now and see the movie in the Paint..