I noticed this quite a lot and have had many corrupt files cause of this. Not sure if everyone has it or not so that's why i bring it up. To reproduce it's pretty much like this: Have Afterburner/RivaTuner on (I use Encoder Service x64, not sure if that matters). Start a Game and begin capture. Close Game. Now the file will still be locked to RivaTuner as it hasn't "noticed" that it's nothing to capture anymore. Solution?, well only choice is to close RivaTuner which causes it to crash. The file then becomes corrupt as there is no header (Only tried this with AVI). There are ways to save the files most of the time, but the hassle is almost not worth it. So can this be solved? I am pretty sure in normal cases it should just stop recording when the Hooked application is no longer there, but perhaps there is something preventing this? Many Thanks.