Before buying, use the trial/demo version. It allows you to scan your drive and see if the bad sectors are actually repairable. If the demo can't see the drive, a "full version" won't help either.
, a powerful utility designed to repair physical bad sectors on magnetic media. While searching for the "full verified version serial," it is important to understand how the software is actually licensed to avoid common security pitfalls. What is DRevitalize?