Restore UBUNTU grub after installing Windows

step 1 :- boot from live ubuntu CD

step 2 :- go to commend prompt & type..

$ sudo grub

$ find /boot/grub/stage1

step 3 :- See the output & copy the grub partition no.

example..

(hd0,1)

step 4 :- Type root (hd?,?) & paste the partition no here.


step 5 :- setup (hd0)

step 6 :- quit

step 7 :- restart the computer