Getting back from Linux Grub menu to Windows boot menu

Suppose you have installed Ubuntu after installing windows, now when you will reboot you system then at startup you will see Grub menu. Now say later on you delete the ubuntu partition or you format that ubuntu based partition & after that when you reboot you will find yourself stuck and will not be able to login inside windows, then may you will use windows installation disk and then try to repair the windows start up, but alas say it also didn't work. then in that case you have to open the cmd prompt from windows 7 installation disk and then type "bootrec /FixMbr". in win xp you have to directly type fixmbr. And after that restart system. Ta da now you can login to Windows 7 OS.