Brightness changing Keys not Working in Elitebook 810 G2 (Hot Key Not working)

[MaqboolThoufeeq]

I recently did an update of Windows 10 64bit. After the update, the brightness hotkey is not working. 

As I searched on this forum, I learned that other people had simulair problems with other notebooks. The solution that worked for them, didn't work for me. I updated my drivers, and tried almost everthing provided in internet, but the keys won't work. 

Does anyone have a tutorial for me that explains what I can do? 

[banhien]

@MaqboolThoufeeq 

Have you tried the following software ?

    https://ftp.hp.com/pub/softpaq/sp85001-85500/sp85423.exe

Hope this helps.

Regards.

[MaqboolThoufeeq]

Sir, I tried it by installing ' https://ftp.hp.com/pub/softpaq/sp88001-88500/sp88033.exe '

as provided in the answer of another similar question, now brightess button worked but my entire hotkeys get changed. 
Alt+F4 not working , It doesn't close anything and

Ctrl+Shift+Esc  not showing Task Manager. 
Like that, It is more difficult than the brighteness problem. 
please help me to solve this issue, I can't even uninstall the previously installed driver.

please help me