Hi....iam using Vista Business with aero enabled...i have a 600gt graphics card and the rest of the system specs are good as well....the problem iam having is that my monitors turn off randomly for no apparent reason(i have a dual monitor setup)....i dont think they actually are off because the monitor lights are blinking and display a "NO SIGNAL " message......also the system is running because i can hear all the sounds from the speakers....i have the latest nvidia drivers ....this problem wasnt occuring under XP. i heard this is a good place to get help...so does anyone know whats going on ? thanks