Grub Rescue Error
 

My lenova lop installed windows7 and linux

when switched on it shows the below error message

GRUB Loading.
Welcome to GRUB
error: unknown filesystem.
Entering rescue mode...
grub rescue>

kindly give the solution.

Thanking you

Your bootloader is not installed correctly. Go to the site below and read the instructions for the bootinfoscript, download and run it and post the results.txt output here. You need to use a Linux disc to do this. It would also help if you indicated which Linux distribution you are using:

http://sourceforge.net/projects/bootinfoscript/