Assuming you're playing this video in windows media player, go into Tools, then options, Then click on the performance tab. At the bottom of that tab, there is an option for "video acceleration". At the bottom, make sure the acceleration is turned all the way to "none". Click Apply, then close that box and then close Windows media player. Re open WMP, play the video you want, and at that scene you want, hit the "Print Screen" button, then paste it into Photoshop or Paint or whatever program you use.