The scale to adjust my screen brightness has disappeared.

I have a HP Pavilion g6. It runs Windows 7.
I use to be able to click the battery icon on the bottom right of my screen and select the Adjust Screen Brightness button.
It would normally bring up the battery control panel screen and at the bottom would be a light scale that allowed me to adjust my screen brightness. Well I don't know what happened bt the scale has completely disappeared and even when I press the adjust screen brightness button, the scale still doesnt show up.

Either you can enable it with a RMB at a symbol on the right bottom (battery?) or you maybe have to re-install some drivers.
You can go here:
http://h10025.www1.hp.com/ewfrf/wc/siteHome?cc=us&destPage=siteHome&lc=en&tmp_docname=
Enter your product number and search for HP lauch button or similar.
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    This question was solved.
    View Solution.

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    Try using Recovery Manager to reinstall your particular Graphics Driver ( AMD, Nvidia, Intel etc ) - the procedure for using recovery manager to reinstall Software and Drivers is detailed in the relevant document on the link below.
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    DP-K
    ****Click the White thumb to say thanks****
    ****Please mark Accept As Solution if it solves your problem****
    ****I don't work for HP****
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