I can't cant change boot option to reinstall w7 on a w8 asus laptop.

Psyshe

Estimable
Oct 3, 2014
1
0
4,510
My sister give me his laptop who was full of shit i want to format and install w7 the thing is i can't do shit in the bios everything is grey i can't change anything.
I read almost everywhere i just have to switch Launch csm or disable Windows boot manager but everything is grey i can't do anything is this bios." Aptio setup utility version 2.15.123 "

I'm sorry english is not my native english i'll be gratefull if u could help me :)