Unless you choose to install grub to a partition instead, the MBR *is* overwritten during installation. If this button continues to function, then it must be a function of the bios, and there's nothing we can do about that.
Unless you choose to install grub to a partition instead, the MBR *is* overwritten during installation. If this button continues to function, then it must be a function of the bios, and there's nothing we can do about that.