Bad Sector on Hard drive

I have a Dell Inspiron 3200 labtop.
It has detected a bad sector on the primary partion of the drive. Cluster 29579
I have one primary partion 2047mbytes and a ext. dos partion of 1051mbytes, the primary dos partion is FAT32 and the second is FAT16.
Machine boots up, tells me about bad sector and starts scandisk, but the hangs at 53% and never gets past that.
boot up in dos can not read drive C.