Windows 7 Goes to Sleep in conflict with Power Option Setting

My Del Dimension E521 running Windows 7 puts itself in sleep mode each night — despite the fact that I have chosen a power option that specifies NEVER

Each morning I find the monitor blank and I have to hit the power button on the PC at which point Windows “resumes”.  The system event log shows this:

Source:        Microsoft-Windows-Kernel-PowerDate:          3/27/2010 3:21:10 AMDescription:The system is entering sleep.Sleep Reason: System Idle

My specific power options are:

Turn off Display          : 20 MinutesPut the computer to sleep : Never

Is there some other setting coming into play here?

Solution:

A lot of times Dell and other companies ship software bundled with the windows install. My Asus laptop had its own power management system that played havoc with my system for days. I would check to make sure there isn’t a Dell program playing games.

Also on another note have you checked the ‘Advanced Settings’ in the power management. There is a other options in there for sleep/hibernate what not.