for the drivers for windows 7-10 the drivers for windows 8.1 will work. so all the drivers needed should be on the mb cd or on mb vendor web page. to remove windows 10 boot from windows 7 or 8 cd go into advance mode and delete all the partions. (system and data) then reboot. window 7 or 8 will remake the system partion for the right os for you. windows 8.1 with classic shell looks and acts like windows 7.