I had this problem myself, and Bob Proffitt suggested that I reduce the Video Acceleration in WMP.
I bet, if you paste a Print Screen copy of the desk top containing a WMP video frame into MSPaint, you can move the pasted image around the Paint window but the actual frame will stay where it is? Wierd when I saw it.
Bob's suggestion worked for me.
Open up WMP, goto Tools > Options and click the Perfomance tab. Reduce the Video Acceleration to half, and try to Print Screen and paste the copy agai9n.
I need to know how to make a screenshot of a video feed, or dvd I am watching on the computer. Using alt+print screen will paste it, but it's weird; when I save it, it winds up as a black screen. If I keep the video feed open I can move it around to change what I'm seeing and such. Does anyone know of a screencapturing image that can overcome this problem?
I am using Windows XP and Windows Media Player, if that helps.