Well, it wouldnt be as much work, as spend as uch money trying to fix your hard drive back to new. If you format then eveyrthing would be the same as before. But its your choice. The ideal option here would be to format, but what you do is your own choice.

__________________
What is a physical body. The body is merely an object. It is a form of existence far too impure to store the gods within us called souls. Now you will remember. The bloodstained history. Material desire. Hunger. Sexual Drive. Desire to dominate. Desire for fame. Humanity. As long as there is a body, desires will be born. The human ego will never disappear as long as desire remains present. Humans will continue to fight to fulfill their bodies desires and it will never end. At this rate there is no future.