I just installed Windows 7 Enterprise for 90days from Microsoft website. I've installed this system in past and adjusting was worked correct. On this installation i can't adjust brightess, it's always on maximum, it's burning my eyes. Adjusting in Lenovo Power Manager not working. Why adjusting not working, my eyes cry and i have headache after few minutes because maximum brightness.
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i have lenovo b570e notebook using Windows 7 (64-bit) ultimate. after installing new windows , i installed all drivers including energy management, rapid storage and display drivers,etc. but unable to adjust the brightness .............. kindly guide me.