[Flame Of Liberty]

It's driving me crazy, no matter if I set HP balanced power plan or Power saver, about once every hour Vista will change it to High performance, then it goes through a cycle 3 times: High performance to HP balanced, high performance to balanced...

I've updated all drivers, tried the powercfg reset schemes command, set HP balanced as preferred plan in registry keys and...nothing.

Any ideas what may fix it?

PS I should add the problem happens both when it's on battery and when it's plugged in.