Fix-Cyclic-Redundancy-Check-Error-in-Windows-–-Easy-Solutions

Fix “Cyclic Redundancy Check Error” in Windows – Easy Solutions

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Fix Cyclic Redundancy Check Error is a common search query for Windows users facing data corruption or hard drive issues. This error usually appears when Windows cannot read or write data properly from a disk, external drive, USB, or even while installing programs. It often looks like this:

Data error (cyclic redundancy check)

If you’ve encountered this problem, don’t worry. In this guide, we’ll explain what a Cyclic Redundancy Check (CRC) error is, why it happens, and the step-by-step methods to fix it on Windows 10 and Windows 11.

What is a Cyclic Redundancy Check Error?

A Cyclic Redundancy Check error is a disk-related error that indicates data corruption or failure in reading files. Windows uses CRC to verify the integrity of files and disks. When the data doesn’t match the expected pattern, Windows shows this error.

This usually happens because of:

  • Bad sectors on your hard drive
  • Faulty external USB or storage devices
  • Corrupt system files
  • Interrupted file transfers
  • Scratched or damaged CDs/DVDs

Also Read: How to Fix “Reboot and Select Proper Boot Device” Error in Windows 10/11

Causes of Cyclic Redundancy Check Error in Windows

Cyclic Redundancy Check Error

Before you fix Cyclic Redundancy Check Error, it’s important to know the root causes:

  1. Hard Disk Errors – Bad sectors or failing drives.
  2. Corrupt Registry or System Files – Windows files may be incomplete or damaged.
  3. Faulty External Devices – Damaged USB drives or external HDDs.
  4. Improper Shutdowns – Power failures can interrupt file integrity.
  5. Physical Damage – Scratched disks or broken drives.

Also Read: 5 Favorite Ways to Optimize Windows 11 for Gaming

How to Fix Cyclic Redundancy Check Error in Windows

Here are the most effective solutions to fix Cyclic Redundancy Check Error in Windows 10/11:

1. Run CHKDSK Command

Windows has a built-in tool called CHKDSK that scans and repairs disk errors.

Steps:

  1. Press Win + S, type cmd, and right-click Command Prompt → Run as administrator.
  2. Type:

chkdsk X: /f /r

  1. (Replace X with the drive letter where the error appears).
  2. Press Enter and let the process finish.

👉 This method scans bad sectors and attempts to repair them automatically.

2. Use SFC (System File Checker)

If the error is caused by corrupt system files, use SFC.

Steps:

  1. Open Command Prompt as Administrator.
  2. Type:

sfc /scannow

  1. Press Enter.

Windows will scan and repair damaged system files.

3. Run DISM Tool (Windows 10/11)

For deeper system-level repairs:

Steps:

  1. Open Command Prompt (Admin).
  2. Type these commands one by one:

DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth

This restores system image files that SFC cannot fix.

4. Check External Drives or USB Devices

If the Cyclic Redundancy Check error appears on a USB or external HDD:

  • Try plugging it into another USB port.
  • Test it on another computer.
  • Use CHKDSK on that device.

5. Reinstall the Application or Copy the File Again

Sometimes, the error occurs during software installation or file transfer.

  • Re-download the setup file.
  • Try copying the file again from the source.
  • If from a CD/DVD, clean the disk surface before retrying.

6. Backup and Format the Drive

If none of the above works, your drive may have permanent damage.

  • Backup your important files (use a data recovery tool if necessary).
  • Format the drive to remove bad sectors.

Steps to Format:

  1. Right-click on the drive in This PC.
  2. Select Format.
  3. Choose NTFS and click Start.

Preventing Cyclic Redundancy Check Error

Cyclic Redundancy Check Error

To avoid facing this issue again:

  • Regularly scan your drives with CHKDSK.
  • Always eject USB drives safely.
  • Use a UPS to prevent power-related shutdowns.
  • Keep backups of important files.
  • Replace old hard drives showing frequent errors.

Also Read: COMPUTER VIRUS | EVERYTHING YOU NEED TO KNOW ABOUT VIRUS

FAQs on Fixing Cyclic Redundancy Check Error

Q1. What does “Data error (Cyclic Redundancy Check)” mean?

It means Windows cannot read or verify the integrity of data due to corruption or bad sectors on your storage device.

Q2. Can I fix Cyclic Redundancy Check error without losing data?

Yes. Tools like CHKDSK, SFC, and DISM can fix errors without deleting data. But if the drive is physically damaged, data recovery software may be required.

Q3. Is formatting the only solution for CRC error?

No. Formatting is the last option. Try CHKDSK, SFC, and other repair methods first.

Q4. Does CRC error mean my hard drive is failing?

Not always. It can be a temporary error. However, frequent CRC errors may indicate a failing hard drive.

Q5. Can antivirus cause CRC errors?

Indirectly, yes. Malware infections can damage files, leading to CRC errors. Running a full antivirus scan is recommended.

Conclusion

Fixing Cyclic Redundancy Check Error in Windows can be simple if you follow the right steps. Start with CHKDSK and SFC, then move to DISM or reinstallation if needed. If your hard drive is failing, back up your files and consider replacing it.

By applying these solutions, you can restore your system’s health and prevent data loss.

Also Read:

COMPUTER VIRUS | EVERYTHING YOU NEED TO KNOW ABOUT VIRUS

What is Security Operations Center (SOC)?

How to Fix “Reboot and Select Proper Boot Device” Error in Windows 10/11

VGA Light on Motherboard – how to fix it and what is it

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