Service Pack 3 update copies an Intel power management driver even to a AMD processor system.

This fix is ONLY for AMD CPUs.

Restart the computer in Safe Mode, (press F8 over and over at startup).
Right-click on "Start", and select Explore, go to C:\Windows\System32\Drivers, right click the file "intelppm.sys" and rename it to "OLD-intelppm.syx", hit enter and make sure it's renamed. You can always rename it back, but it shouldn't be used on a AMD system.

You can also use the "Windows Recovery Console" to rename the file using the comand line. (commands are "cd" into the directory, "rename
intelppm.sys OLD-intelppm.syx")

Or simply use a Linux boot CD, such as Ubuntu, or the "Ultimate Boot CD", which will boot and give you a GUI that lets you rename files and perform other tests.

Other problems can be caused by SP3, some people have reported using the "System Restore" feature to go back to SP2 settings until SP3 is fixed.

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