I was having difficulty with a HD more or less "hanging" -- seeking without successfully reading a file. Believing I had a bad sector or two in that file, I ran chkdsk with the sector scan options.
If your hard drive on your PC is experiencing a lot of errors, one of the solutions is to do a search for bad sectors and try to fix them. To do that you can use a built-in Windows utility called ...
If you get The device, \Device\Harddisk0\DR0, has a bad block, Event ID 7 on your Windows computer, follow the solutions mentioned below. Use Macrorit Disk Scanner to scan Hard Disk for Bad Sectors ...