Asslam u alikum every one

Meri hardisk 40 gb Ide jo k dell gx 520 pe lagi hoi thi game khelte hoe pata nahi kese hardisk lock hogai. ab na to windows install kar sakte hea aur na hi partition hoti hea. kiya koi expert bata sakta hea k Hardisk ko kese unlock kiya jae?

mene kafi sare partition tools use kar liye dos me bhi check kar liya but kuch nahi horaha. plz help me.