Solved Acer aspire v5 backlight is so dim after downgrading

Hi i have a acer aspire v5-743pg laptop. Apparently its brightness is so dim now even thou i set it to the highest brightness possible, i mean i use my laptop when it was in windows 8.1 in the lowest brightness and i can see everything fine, not too dark and not too bright.After downgrading it to windows 8, now even thou i set it in around half of the bar the brightness is still grayish like everything is like a shadow( i hope you understand what i say). Its just to dark for me now do you think i need to update some of my hardware if so, what hardware might it be?

Did you install the Acer video and power control drivers for Windows 8?