Chkdsk (Chkdsk.exe) is a command-line tool that checks volumes for problems. The tool then tries to repair any that it finds. For example, Chkdsk can repair problems related to bad sectors, lost clusters, cross-linked files, and directory errors. To use Chkdsk, you must log on as an administrator or as a member of the Administrators group. You can also run Chkdsk from My Computer or from Windows Explorer . Click the start button Right-click "My Computer" and select "Explore" Right-click the disk you want to check and select "Properties" In the properties dialog click the tab "Tools" Click " check now" The " checking disk" dialog appears, check both options and click start You will probably see a message that chkdsk wants exclusive access to the disk and therefore wants to begin first thing after you restart your computer. Accept by clicking ok. Restart your computer When your computer restarts you will see ch...