I have just installed Windows 7 in parallels 5 in a MacBook Pro 17'' purchased this month (3Ghz, 4 Gb ram ...) Aero works from the very first moment and everything goes perfect. But, every 5 min. (approx.), the screen blinks (into black). Most of the times, nothing happens, just a very annoying blink, but from time to time, Aero disables... I have to swith it on manually ... then, the same story again ... It's a pitty because it works really well until this happens ... if I disable Aero, nothing wrong happens, but I really experiment a more fluent experience with Aero activated (not just something aesthetic, windows movement and scrolling is faster). Any idea ? Anybody has experienced something similar ?