NOTE
If you are running the scan on a disk that is currently in use, and you check the option to Automatically fix file system errors, you will receive a prompt to re-schedule your disk check for when you re-boot your PC. This is because chkdsk needs exclusive access to your hard drive to complete its task.
=>> Click on Schedule Disk Check, which will schedule chkdsk to run the next time you boot up your computer, just before Vista loads.
=>> When you shut down your PC, instead of re-starting, completely shut it down and then power it up.