My Energy Saver option is locked - how do I unlock it? When I click on the lock, I can't make changes - it will not unlock.

My Energy Saver option is locked - how do I unlock it? When I click on the lock, I can't make changes - it will not unlock. My passwords are disabled. I'm using iMac with the OS X Version 10.9.4. Many thanks.

Maybe the following since I do not really understand what yo mean by click on the top part of the screen
Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues - Apple Support

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