Grub error ,system not booting

I tried to install Linux mint in Windows 10.but due to some file missing installation failed.now the windows is unable to boot. The below message arrives.how to resolve this?pls help

GNU GRUB version 2.02~beta2-9ubuntu1

Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device or file completions.

grub> _