Windows Operating System
Some processor performance power management features have been disabled due to a known firmware problem. Check with the computer manufacturer for updated firmware.
This event is thrown when one or more of the following conditions exists:
1. Update the BIOS firmware for the motherboard
2. If your motherboard supports Speedstep, make sure Speedstep is enabled.
3. Check with your hardware manufacturer to determine if there are known compatibility issues with Windows 7.
4. Try disabling processor power management features.
Microsoft Extended PSS ACPI Method Specification
Processor Power Management in Windows Vista and Windows Server 2008
Power Policy Configuration and Deployment in Windows
Using PowerCfg to Evaluate System Energy Efficiency