Sometime you will found out that on some cases you cannot reset your monitor power option, hibernate option and other settings in the power options button. This thing happen when your laptop/pc is using the OEM's version of powercfg.cpl.
You may able to click the button, however it will just have a little bit blink on the top of your Start menu button.
To get rid of any non standard powercfg.cpl alternatives, just go to
and rename the "shellex" subfolder once you have there to something little bit different, such as
"shellex.NEVER" or "shellex.RENAMED".
From now on Windows will use its powercfg.cpl instead of your OEM's version.
Should you revert, just rename the shellex key back.