Screen brightness windows 8.1 problem

Hi I have MSI GT683DX, after update windows 8 --> 8.1, scm have some new problems, now not only turbo button not working(Yes I know if I install older nvidia driver will work) but screen brightness and ECO button(power plan movie,office,game etc..) not working as well... Some help please I try some windows 8.1 fix (google) methods for brightness but without success so I think that is again SCM problem is not updated for windows 8.1 ... ?! THANKS

Installed older nvidia drivers again and wow again everything work well 

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    "I work for Hewlett-Packard"
    * * * * * Click the "Purple Thumbs Up Icon in the lower right corner of a post" to say thanks * * * * *
    * * * * * Please mark Accept As Solution if it solves your problem * * * * *
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