Hard drive bad sectors and repair?

I have a hard disk with many bad sectors,and Errors in it, This might cause system crashes and also makes my windows slower. lately i formated it more than 6 times and installed 6 versions of windows. assuming i have ran scandisk thoroughly, i want those bad sectors repaired and be on its good condition again,... show more I have a hard disk with many bad sectors,and Errors in it,
This might cause system crashes and also makes my windows slower.
lately i formated it more than 6 times and installed 6 versions of windows.
assuming i have ran scandisk thoroughly, i want those bad sectors repaired and be on its good condition again, what softaware i must have and where to have it? does Norton Disk Doctor do the job? how about checkdisk what does it do? give me opinions on how to save my hard drive.
8 answers 8