Windows 7 Problem on screen brightness adjustment(Windows 7 Ultimate 64bit)

[unknownzhou]

Hi, I observed a problem on my new pc with windows 7.

When I try to adjust the screen brightness, the adjustment slider is always in minimum in Control panel>Hardware and Sound>Power Option, as shown in this picture

but once I go to the "Edit Plan Settings", the slider is in maximum position, as shown in this picture

I can adjust the brightness under the "Edit Plan Settings" but not in the "Power option". Something must be wrong here, does anyone know how to fix this? Many thanks!

 

[Fixer1234]

If this is not already overtaken by events, what is your goal--are you trying to adjust the screen brightness for comfort and visibility during normal use? trying to stretch battery time on a laptop? trying to set the dimness level during periods of inactivity?