How did you attempt to do it?

Tuckster wrote:

Don't you press CTRL+PRINT SCREEN, and then go into MS Paint and paste it in?

It depends what program you're using to run the DVD. This won't work with Windows Media Player. When you print screen, it will look like it worked, but when you reload the screenshot, there will be a black box where the video was.

PRINT SCREEN will work with InterActual Player, but not other players like Real Player or even PowerDVD. PowerDVD has its own screenshot option, but I've never had any luck getting it to work.

If you're using an avi file, downlad VirtualDub and load it in that. VirtualDub is very free and very popular, so shouldn't have much trouble finding it. Loading the avi in VirtualDub and then you'll be able to go frame by frame until you find the shot you want. Then you can C&P it into Paint using the Print Screen button.