Some users have resolved SPM related performance counter issues by running this Microsoft Windows command as Administrator: "Lodctr /R" (the R is uppercase).
This will rebuild the Windows Performance Counters if they are corrupted somehow. See http://support.microsoft.com/kb/300956
for more details.
Steps to run the command "Lodctr /R":
You'll need a DOS prompt with elevated privileges (even above the normal Admin):
1) Start Menu/All Programs/Accessories, right click on "Command Prompt" and select "Run as administrator".
2) At the command prompt, type in "Lodctr /R" and hit Enter. (Please note that the R is uppercase)
3) This command may take several moments to complete, and if successful should display something like:
Info: Successfully rebuilt performance counter setting from system backup store
4) In some cases, restarting your computer is necessary to complete this process.