HOW TO: List performance issues with your Vista or Windows 7 machine
In Windows Vista and Windows 7 there is one feature that many does not know about that lists performance issues with your system. It can show you for instance if a driver of any kind is making “sleep mode” take longer than expected or software the make your computer start or turn off slow.
You find this more or less hidden feature by starting “Performance Information and Tools”. Then click “Advanced tools” in the left menu and then look under the first section “Performance issues” for possible causes of system performance issue.