What is a good disk recovery software for laptops?

Hello techyv.com!
I have here a Lenovo Laptop.
Now my harddisk got crashed and there are lots of important files on it!
It started out to become slow in processing and when I shut it down, it won't turn on anymore.
Now I guess it needs to be formatted.
But the thing is, I have lots of important files out there so please give an advice of a good disk recovery software?
