Brightness Issue in my Hp 15-R006TU Note book

Question

Hi,
I have a problem with my screens brightness.Its My HP 15-R006TU notebook.I purchased my notebook on may 31 and it came with DOS OS.So i formatted it windows7 64 bit OS.But now i am having some display problem.When i am switching over any window my brightness incresing slowly and again if i will move to any dark screen then it change slowly. When i connect charger it goes asusal.
for e.g:
Let us consider i am watching a video in some player.suddenly if i will move to my desktop screen the light will change slowly either increase (If bright)/dim slowly.This made me sad after purchased my new HP notebook
Kindly help me or suggest me what to do.
Regards,
Asish Kumar Panda
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Answer 1

sir  my problem can not solved
i purchased a  new hp notebook 15-r006tu and install windows 8.1 64 bit
some problem are ----------
1 .
i have installed  graphics driver but i can not change led display bright ness with hot key  ( fn + bright change key )  .
although adaptive  bright ness is off ????  ( probably graphics driver problem ??? ) ..
2 .
when i  want to stop ( wifi and bluetooth )  using hot key   fn + network botton  button  then only bluetooth is off
but wifi is still run .
what is hot key ??? or how i stop  wifi ???