Researching Hard Drive with HDD Regenerator, a tool to recover data from bad sectors on hard drive, chkdsk may have to provide. Change the value in the register as below.
This key exists only if chkdsk has been run once. To chkdsk should check the sectors that are marked "BAD", change the last two digits of "04".
T.exe. if the value is
B1 03 40 00
B1 03 40 04