Very Slow Boot Up - Disk Errors

All of a sudden, my computer is taking about 5 minutes to fully boot up. Before, it took less than a minute to do so. I checked out the Event Viewer and I saw a bunch of disk errors which said, "The deviceDeviceHarddisk 1D has a bad block". D was a partition on my secondary drive. So I performed a chkdsk on it. It found no problems. I used Fix-it Utilities 7 to test it. No problems found. Still taking 5 minutes to boot up and getting the same disk D error events. I swept my system for spyware and malware with Spy Sweeper, Spyware Doctor and Ad-Aware. No problems found. Still taking 5 minutes to boot up and getting the same disk D error events