brightness is not adjustable

[uni007]

ok here is the issue

hp compaq 6735s that cant adjust brightness it is set at the lowest setting

ewrithing worked perfectly until windows update decided to install (upgrade) windows 10 on this machine 

then the brightnes went to hell, after that update i could not change brightnes lvls either through fn keys or control panel 

i tried to redownload drivers for it but it didnt help so i shelved the damnn thing and after a year i thought of reviving it 

so i reinstalled windows 7 ultimate 64 bit version (originaly it used windows 7 32 bit) on it and allowed windows to install drivers on its own but nothing was fixed i tried mannualy downloading and installing drivers from hp pages but it didnt fix the problems

i tried deleting and reinstalling monitor drivers in device manager and it didnt work

i tried some of the suggested things on the internet and it didnt help either 

the only thing that i didnt try is to change the bios version 

in my pursuit for a solution someone suggested changing the bios version  might fix it 

so now im staring at different bios versions and praying that i dont need to fiddle with it 

my bios version is       68gpp  ver. F.07.    21. 11. 2008

smbios 2.4

now can somebody help me fix this 

ps. i own a really old dell laptop (dell 500) and in its bios there is a little feature to adjust the brightens of the screen so 

why is hp not including the same with theirs models

[Huffer]

The brightness control generally needs the right video driver to work properly. What is it showing under display adapters in your device manager? 

You need the QuickLaunch driver to enable the brightness adjustment keys:

http://h20564.www2.hp.com/hpsc/swd/public/detail?sp4ts.oid=3687622&swItemId=ob_78740_2&swEnvOid=4060

All Win 7 64 bit drivers:

http://h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=3687622&swLangOid=8&swEnvOid=4060

I would go ahead and update to the F.21 BIOS if I were you, but that is not the issue with the brightness adjustment. 

If this is "the Answer" please click "Accept as Solution" to help others find it. 

[uni007]

well i tried to fix it with the win7 64 bit drivers but it didnt work so ijust gave up an reinstalled win7 32 bit that was originally on it and everything worked so i dont know why is this laptop model so selective with the software

but the problem is fixed