Repairing Bad sectors

Hello to everyone,

In order to correct bad sectors I used " WD data lifeguard diagnostics " to write zeros to my HD (of 500 GB), it’s been taken a long time, I launch it Thursday evening and today is Sunday 20:44, it is more than three days and the software has just writed zeros to 45% of HD. Other things, " the Elapsed Time " it shows 02:35:00 and " Estimated Time Remaining "shows 102:39:41 which concerne " current sector 411066623 of 976773167 " (at the moment I’m writing this message). My question is: do you find that normal ? or the software doesn’t work properly ? and the the Elapsed Time isn’t correct.  It will take a week to finish, I think.

please if anyone has already used this software, could help about what to do ? what could y advise me ?

thank you very much in advance