Generally, you should be able to repair the drive by having chkdsk mark the sectors as bad. Depending upon the location of the bad sectors, you may need to reinstll windows. However...........once this starts happening, I've found that the errors become progressive as the drive continues to "take a dump". Save your data....if you can't boot into windows, buy a new hd and install the damaged drive as a slave and then save your data back to the master if you can still access the drive. Yes, it sucks when you hard drive dies!!!!!
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.