until you have a backup of your important files.
Instead of hunting for a dead serial number, consider these tools—many of which are free or have generous free versions. hdd regenerator 2011 serial number
When a drive developed bad sectors, the result was a slow, agonizing death. Files would corrupt, the operating system would freeze, and the dreaded "blue screen of death" would become a frequent visitor. Standard software could not fix this; it could only mark the sectors as "do not use," slowly shrinking the capacity of the drive. until you have a backup of your important files