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How to repair a cyclic redundancy check on a hard disk

Updated July 20, 2017

A cyclic redundancy check error on a hard disk means that part of a file read from the hard disk doesn't match the expected value. A cyclic redundancy check error, in other words, means that files on your hard drive are corrupted. Repair a cyclic redundancy check error on a hard disk using the Check Disk tool in Windows.

Click "Start" and click "Computer."

Right-click the hard disk with the cyclic redundancy check error under "Hard Disk Drives" and click "Properties."

Click the "Tools" tab at the top of the hard disk "Properties" window.

Click "Check Now" under "Error Checking."

Select "Automatically Fix File System Errors" and "Scan for and Attempt Recovery of Bad Sectors" in the "Check Disk" window by clicking each option if it isn't already selected.

Start a disk check and repair by clicking "Start" in the "Check Disk" window.

Click "Yes" if the "Do you want to schedule the disk check to occur the next time you restart the computer?" prompt appears. A disk can't be checked if it's in use, so you'll need to restart Windows to check it.

Restart your computer by clicking "Start," clicking the arrow icon to the right of "Shut Down" and clicking "Restart."

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About the Author

Chris Hoffman is a technology writer and all-around tech geek who writes for PC World, MakeUseOf, and How-To Geek. He's been using Windows since Windows 3.1 was released in 1992.