grub 引导破坏,如何还成功进入windows

Today i encounter one tricky issue is that i can't enter into the 'windows boot menu' after i merge the previous linix, after i reboot the test computer, the boot menu still is 'grub', and it can't go further any more, it was stopped at the '>grub ' letter screen.

1. How to solve this problem?

>grub
>grub root (hd0,0)
>grub chainloader +1
>grub boot

after that, you will go to the 'windows boot menu'.