Hi. I'm new, here. I have a question, though, about video playback, on Windows 7. From time to time, (Which is really frequent), during video playback, annoying little green rectangles keep popping up, for around a split second. It's an annoying blink, and, I have a question, about that. Is it a virus? If so, how do I remove it? If it's not a virus, how do I fix this problem? Please, respond, as soon as possible - it's really driving me up the wall, that I can't watch videos, without those damn rectangles. Thanks.