Restore the Windows bootloader from DVD

Sometimes Dual OS installation corrupt your boot loader and you want to load previous boot loader.

For example you install Windows 8 and uninstall it but still you are having trouble with boot loader and want to go back to Windows 7 boot loader.

The easy way is to boot from the DVD and use Startup Repair.

Go into the command prompt after booting from the DVD, and use these commands:

bootrec /fixmbr
bootrec /fixboot
bootsect /nt60 all

Of course you have to be careful when trying to replace the bootloader, as it can result in a failure to boot.