i want to downgrade my laptop ASAP. I have done the uefi to legacy and disabled secure boot. I have formatted the drive to ntfs using gparted..Still when installing windows 7 i get a error as "System cannot create a new partition or locate an existing partition".. Why is it like that?..But i can install ubuntu flawlessly and work.. so my hdd is not corrupted.. please help.. I like windows 8.1 but the problem is it shows crc error wen installing drivers..Also the drivers are present in device manager.. I know it has audio and bluetooth.. But it also has amd graphic driver...how?? plz provide answers soon..... thnx