Even if I go from the "real administrator account" and uncheck "sample automatically" from the Performance monitor properties, if I close it, then open it, the checkbox is checked again!! I get the feeling it doesn't want to let me disable it. I'm getting a HD LED pulse every second like a clock. This could be the cause. Anyone know how to turn this off? If I go into Services applet the performance and notifications service is on Manual and not running, so that's not it.