Chkdsk (Chkdsk.exe) is a command-line tool that checks volumes on your hard disk drive for problems. The tool then tries to repair any problems 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.
also run Chkdsk from My Computer or from Windows Explorer.
Chkdsk requires exclusive access to a volume when it runs. Therefore, if one or more of the files are open on the disk that you want to check, Chkdsk prompts you to schedule the disk check for the next time that you restart your computer.
Chkdsk might take a long time to run, depending on the
number of files and folders, the size of the volume, disk performance, and
available system resources, such as processor and memory.
Chkdsk might not accurately report information in read-only
Double-click My Computer, and then right-click the hard disk that you want to check.
Click Properties, and then click Tools.
Under Error-checking, click Check Now.
Note The Check disk options dialog box appears.
Use one of the following procedures:
To run Chkdsk in read-only mode, click
To repair errors without scanning the volume for bad
sectors, select the Automatically fix file system errors check box, and then click Start.
To repair errors, locate bad sectors, and recover readable information, select the Scan for and attempt recovery of bad sectors check box, and then click Start.
Note If one or more of the files on the hard disk are open, you receive the following message:
The disk check could not be performed because the disk check utility needs exclusive access to some Windows files on the disk. These files can be accessed by restarting Windows. Do you want to schedule the disk check to occur the next time you restart the computer?
Click Yes to schedule the disk check, and then restart your computer to start the disk check.
The following table lists the exit codes that Chkdsk reports after it has finished.
Collapse this tableExpand this table
No errors were found.
Errors were found and fixed.
Disk cleanup, such as garbage collection, was performed, or cleanup was not performed because /f was not specified.
Could not check the disk, errors could not be
fixed, or errors were not fixed because /f was not specified.
For more information about Chkdsk, go to the following Microsoft websites: