Reinstalling the Hypervisor lead to new errors in which it says
boot failure. Reboot & select proper Boot Device ( proper devices are selected in Bios in Hyper V) , I did boot the disk into the cmd mode & then tried bootrec /fixmbr which worked but when I try bootrec/fixboot it says "access denied" , I did rebuild the MBR but still the same error that cannot boot from disk