Don't know if this info is of use... this morning, fire up pc, scroll through 3 or 4 games, playfield goes black while I'm slowly scrolling. Exit, reload and its been scrolling on its own for 45 min w/o incident! Also, before fresh install of 7 iwas on xp, had installed and uninstalled shark (before pbx was out) and had been using regular ffdshow. It worked fine then but I would see a lot ffd icons in task bar window... again dunno if it helps, trying to help. I'm not worried... I'm sure you smarty-smarts will figure it out! Thx!