SOLVED
I've got a video file. It's rather large, and I want to delete it, because when you double-click to play it, windows media player says it can't find the correct codecs, and I have loads of video codecs installed.
But whenever I try to delete it, it says it's in use by another program. I've gone into the task manager and ended as many programs as I safely could, I've rebooted and tried to delete it as soon as the computer is powered on, but it WILL NOT DIE!
Do I have some sort of spyware hiding in the movie file maybe?






























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