Windows 7 64 laptop not entering sleep

I was having trouble with my laptop not going to sleep after the time setting in power options.  After some search, I read that running a power usage report might help identify the problem.

Running the following command from an Administrator shell:

powercfg -energy -output %USERPROFILE%\Desktop\Energy_Report.html

pointed out my audio card was making system requests such that sleep would never trigger.  I updated the drivers on my card and the audio card is no longer holding up the sleep timer.