Fix grub

Boot from live dvd OR choose RESCUE from boot USB (graphical desktop
is ok) 
 use gparted to find boot partition 
 mount /dev/sdX /mnt 
 
 mount /dev/sda5 /mnt 
 
 mount –-bind /dev /mnt/dev 
 mount –-bind /proc /mnt/proc 
 mount –-bind /sys /mnt/sys 
 chroot /mnt 
 grub2-mkconfig -o /boot/grub2/grub.cfg 
 grub2-install /dev/sda 
 chtrl-d 'exit' 
 reboot 
 
 grub edit 
 F2 into grub CLI 
 insmod ntldr 
 insmod ntfs 
 insmod chain 
 set root=(hd0,msdos1) 
 chainloader +1 
 boot