Use the System File Checker tool to repair missing or corrupted system files. When critical Windows system files are missing or corrupted, some Windows features may stop working correctly or Windows may stop responding altogether.

Whenever one wants to run chkdsk on a partition he or she can not run that command. Such locking of the drive partition may be due to third party virus checker or disk monitor tool. 1]Click Start, go to Run menu and type services.msc and click OK.

Learn how to run System File Checker in Windows to check if your computer has problems with files.

Fixes a problem in which the ChkDsk.exe utility reports an error when you run this utility on a volume that is a multiple of 8 GB on a computer that is running Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2.

In this scenario, chkdsk reports errors on the drive if the snapshot runs within the second phase of chkdsk. However, when the snapshot is complete, everything is fine again, and chkdsk does not report any errors.

Fixes an issue in which the chkdsk command doesn't run correctly in Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2.

On a computer that is running Windows 7, you use the Chkdsk.exe program to schedule a disk check during the next system startup. However, the disk check does not start correctly.

Scan the drive now and fix it. You run the Check Disk Tool (CHKDSK) to fix the drive. However, no issues are found. Immediately after CHKDSK is finished, the volume is reported as "Clean." You restart the system. Or, you unmount and then remount the volume.

You run the Chkdsk.exe tool to verify the integrity of the file system. In this scenario, the Chkdsk.exe tool incorrectly reports that there is a file system corruption.

This article introduces a hotfix that updates the Chkdsk.exe utility in Windows 7 and in Windows Server 2008 R2. Currently, the Chkdsk.exe utility cannot repair certain corruption errors on the system volume.