My Laptop Dell Latitude E5530 problem 8.1 please help me to fix

Guys I Had Installed ubuntu Imstalled First noe i am back to windows 8.1 but i installed it via unofficial way i used my freind laptop os windows 8.1 made a bootable of it and booted on my laptop but i am facing many issues like low sound very low sound issue,areoplane made always enable because of it i am not able to use wifi on my laptop to download drivers,

i downloaded drivers from my brother laptop from dell site but installing them is useless so please guys can i get any help in this matter