Ever since I installed SP1, I get the message 'some processor performance power management features have been disabled due to a known firmware problem. Check with the computer manufacturer for updated firmware. What should I do about this? Should I worry about it?

Hey!

Could you please let us know what motherboard you have? Is it by any chance MSI 945PL Neo3?

Cheers!

It's a ConRoe1333-D667 which is made by ASRock

Please give as much information you can about the computer so it can be easier to identify your problem.

I do not know if this will be of any help, sorry if it doesn't.
http://www.drivers.mrjuan.com/driver...1333-d667.html

I have got my client a new motherboard, as everything else has been eliminated