Check you windows power management settings.
Win 7 has options for preformance, balanced , or power saving.
If you have PS selected, it will run as slow as possiable (but your battery lasts a loooog time)
Preformance will force it to the CPU rated speed (which prevents you from saving power when idle and prevent Turbo Boost when under a light load)
Balanced is the setting to select for most people.
I am using Windows XP Pro, but it looks like one of the power settings was restricting the CPU operation. I reset power management from within Windows to maximize performance and reenabled SpeedStep. The core speed now idles at 800MHz, but will quickly go to 2.0GHz during benchmark testing. Resulting benchmark score is now 19786 marks. At least double what it had been running. Thank you.