My Presario has two 75gig hard drives. Unfortunately, the boot drive contains 3 bad clusters. Chkdsk (thorough surface check),Norton's DD and Speeddisk freeze at the first bad cluster, make a rapid 'clicking' noise for about 30 seconds (similar to a problem from an earlier post), then restart themselves from the beginning. I recently upgraded to XP and am considering converting to NTFS (for reasons other than the bad clusters). Questions: Instead of using convert.exe to implement NTFS, will a low level format of the bad drive eliminate the bad clusters? Is the drive worth keeping, or should I look to replace it? I've been able to get a good, complete backup of the drive to DVD. Thanks in advance for any suggestions.