Handy download if you are experiencing these types of problems

Diagnosing Application Compatibility Issues Affecting Windows Power Management

Have you ever wondered why Windows power management doesn’t always seem to work as you might expect? Perhaps the display goes off while you are watching a video or you come back to your PC after being away for a while and it hasn’t automatically gone to sleep like you expected? This document gives IT professionals, PC enthusiasts and software application developers and testers the guidance they need to diagnose issues with interactions between Windows power management and software applications

Read more about Windows 7 Power management

Rob