Data error (cyclic redundancy check) error

By: Madeleine Dean
5 minute read
Data error (cyclic redundancy check)

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If you’re getting the ‘ERROR_CRC’ error code with the ‘Data error (cyclic redundancy check)‘ description, follow the troubleshooting steps listed in this article to fix it.

ERROR_CRC: What it is and why it occurs?

A cyclic redundancy check  is an error code that occurs when your system has detected accidental changes to raw data. It is used in digital networks and storage devices, and it often occurs when Windows detects major drive changes and fails to recognize the drives connected to your computer.

This error sometimes occurs in Outlook as well, after the tool downloads emails to your computer, preventing you from viewing the messages that you downloaded. This issue may occur if your personal folder file is corrupted.

How to fix ‘Data error (cyclic redundancy check)’

Solution 1 — Check your disk for errors

On Windows 10, you can run a disk check using Command Prompt.

Start Command Prompt as administrator and type the chkdsk C: /f command followed by Enter. Replace C with the letter of your hard drive partition.

As a quick reminder, if you do not use the /f parameter, chkdsk displays a message that the file needs to be fixed, but it does not fix any errors. The chkdsk D: /f command detects and repairs logical issues affecting your drive. To repair physical issues, run the /r parameter as well.

On Windows 7, go to hard drives > right-click the drive that you want to check  > select Properties > Tool. Under the ‘Error checking’ section, click Check and check the ‘Automatically fix system file errors’ option.

Solution 2 — Format your hard drive

If the solution above didn’t work, try formatting the problematic drive. Formatting and restoring the default drive settings should fix this error. Keep in mind that formatting your drive means deleting all the files and folders stored on the respective drive.

You can format your drive using Command Prompt:

1. Go to Start > type cmd > right-click the cmd search result > select “Run as administrator”
2. Type format C: /FS:exFAT > hit Enter to begin formatting the C drive as exFAT. Replace C: with the letter of the problematic drive.

You can also format your drive using the Disk Management utility:

1. Go to Start > type ‘disk management‘ > select the Disk Management utility

2. Right-click the drive that you want to format > select the Format option

3. Follow the on-screen instructions to further customize the format process > click OK on the warning window.

4. Once the format process finishes, you can use your drive. Try to install the updates again to see if this action fixed the problem.

Solution 3 — Clean your temporary files and folders

The simplest and quickest manner to delete your temporary files and folders is to use Disk Cleanup. As you use your computer or browse the Internet, your PC accumulates various unnecessary files.

These so called junk files may affect your computer’s performance and also trigger various error codes, including the ‘ERROR_CRC’ error code. Clean your temporary files and then try to use your drive again.

Here’s how to use Disk Cleanup on Windows 10:

1. Go to Start > type Disk Cleanup > launch the tool


For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

2. Select the disk that you want to clean > the tool will them tell you how much space you can free up

3. Select “Clean up system files”.

Here’s how to use Disk Cleanup on Windows 7:

  1. Go to Start > type Disk Cleanup > open Disk Cleanup.
  2. In Disk Cleanup’s description section, select Clean up system files and select the drive that you want to clean up > click OK.
  3. On the Disk Cleanup tab, select the check boxes for the file types that you want to delete > click OK > select Delete files.

Solution 4 — Use the previous drive letter/ change the drive letter

If the ‘Data error (cyclic redundancy check)’ error code occurred after you changed the letter of your drive, try restoring the previous letter.

1. Go to Search > type “disk management” > select the first result > launch the tool
2. Select the problematic drive > right-click it > select Change driver letters and paths

3. Click on the Change button > restore the previous driver letter > click OK.

Solution 5 — Install PartedMagic or Recuva

Users also reported that PartedMagic can fix the ‘Data error (cyclic redundancy check)’ error code. PartedMagic is a disk partitioning and data recovery tool that supports many drive formats, including FAT16, FAT 32, HFS, etc.

It can format internal and external hard drives, create, move and delete hard drive partitions, clone your drive etc.
You can download PartedMagic from the tool’s official website.

Recuva is a powerful file recovery tool that you can use to recover files  from damaged disks. Thanks to its deep scan feature for buried files, Recuva is able to retrieve virtually any lost files. Many Windows users confirmed that Recuva helped them fix the ‘Data error (cyclic redundancy check)’ error.
You can download Recuva for free from Piriform.

Solution 6 — Use diskpart

You can also use the diskpart command to fix the ‘Data error (cyclic redundancy check)’ error code. Diskpart is a powerful tool for hard drive management,and using it can cause damage to your system. Be extra caution when using this command and keep in mind that you’re using it at your own risk.

  1. Go to Start > type Diskpart > right-click diskpart in the search results > Run as administrator.
  2. Type the list disk command to identify all the available devices
  3. Type select volume X (replace X with the volume number assigned to the device) to select the problematic drive
  4. Type the clean command to clean the drive
  5. Now, you’re going to create a new partition using the create partition primary command
  6. Type the command select partition 1 to select the recently added partition
  7. Then type the command activate to activate the new partition and the command format FS=NTFS label=[add the letter your new drive] quick. Type the command without the brackets.
  8. Type assign letter=Y (replace Y with the letter that you want to assign to the device).

Fix ‘Data error (cyclic redundancy check)’ on Outlook

As we mentioned at the beginning of this article, the cyclic redundancy check error may also occur on Outlook. Here’s how to fix it:

1. First check your drive for errors (see Solution 1 above for more details).
2. Repair your personal folder file with the Inbox Repair Tool. For a step-by-step guide on how to do this, check out Microsoft’s support page.

We hope that the solutions listed above helped you fix the cyclic redundancy check error. As always, if you’ve come across other workarounds to fix this problem, you can help the Windows community by listing the troubleshooting steps in the comments below.

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For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

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