What Is a Cyclical Redundancy Check Error? How to Fix It Easily?

When you try to open or transfer files on a Windows PC, you might run into a frustrating message: “Data error (cyclic redundancy check).” This error can also appear when accessing external hard drives, making you worry about losing important files. But don’t panic! This guide will explain what a cyclic redundancy check (CRC) error is, why it happens, and several effective ways to fix it without spending a dime. We’ll also introduce a powerful tool that helps keep your data safe while troubleshooting.

Part 1: What Is a Cyclical Redundancy Check Error?

You might be wondering, “What is a cyclic redundancy check error?” Simply put, Windows uses CRC to verify whether the data on your storage device is intact or corrupted. If your disk fails this check, Windows will display the error message: “Data error (cyclic redundancy check).” Until the issue is resolved, you won’t be able to access any data on the drive.

Part 2: What Causes a Cyclic Redundancy Check Error?

Several things can cause a cyclic redundancy check error. Some are minor, while others may be signs of hardware issues. Here are the most common reasons:

• Your operating system files are damaged or missing.
• Your old hard drive has bad sectors.
• Malware or virus attacks.
• The file system on the disk is corrupted, usually caused by improper ejection, forced shutdown, or software glitches.
• Problems with USB cables or ports.

Part 3: How to Recover Data Lost Due to a Cyclic Redundancy Check Error?

Since CRC errors are in most cases closely related to disk failures, the priority is often data recovery. With a success rate of 99.4%, Tenorshare 4DDiG is a free tool that can retrieve data from inaccessible, unreadable, or logically damaged drives. It can recognize over 1000 data types, including photos, videos, audio files, documents, emails, archives, etc. Here are more details about this powerful data recovery software:

• 4DDiG offers a clean and simple interface, allowing even beginners to perform data recovery effortlessly.
• The software works seamlessly with various storage devices, including HDDs, SSDs, USB drives, and memory cards.
• This app can retrieve files lost due to accidental deletion, formatting errors, system crashes, virus attacks, or hard drive failure.
• You are able to preview recoverable files before restoring them.
• This program is available for both Windows and Mac systems.

The following is an example of using 4DDiG to recover data lost due to a cyclic redundancy check error:

Step 1: To begin, download and install the 4DDiG Data Recovery tool on a separate physical drive. Run the program, hover over the disk that is experiencing a CRC error, and click “Scan.”

Step 2: The software will scan the selected location for all recoverable files. Once the scan is complete, you can filter the results by file type or path to ensure you find exactly what you need.

Step 3: After previewing the desired files, select them and hit “Recover” in the lower-right corner. Avoid saving recovered files to the drive where they were originally stored, as this could overwrite data and lead to permanent loss. 4DDiG allows you to save them to a cloud drive such as Google Drive or Microsoft OneDrive.

Part 4: How Do I Fix a Cyclic Redundancy Check Error?

Method 1: Reboot Your Computer

A simple reboot can refresh Windows, clear memory, and resolve minor conflicts that may be preventing your computer from reading or writing data correctly. Remember, restart your computer using the normal restart option in the Start menu.

Method 2: Run Error Checking Tool

One common cyclic redundancy check (CRC) error fix is to use the built-in disk repair tool, CHKDSK. If you’re not comfortable with command-line tools, you can use File Explorer to perform a similar disk check. To do so:

Step 1: Press Win + E, locate the affected drive, right-click on it and pick “Properties.”

Step 2: After entering the “Properties” window, click the “Tools” tab.

Step 3: Hit the “Check” button under the “Error checking” section.

Method 3:Run System Integrity Tool

If you encounter a data error cyclic redundancy check when trying to download game, it’s likely because Windows system files are incomplete. Thankfully, all versions of Windows provide a tool called SFC, which can scan for and replace these corrupted files automatically. Here’s how to use it:

Step 1: Bring up the Run dialog box by pressing the Win + R. Write “cmd” and press Ctrl + Shift + Enter instead of just Enter.

Step 2: In the Command Prompt, type the “sfc /scannow” command followed by pressing the Enter key.

Method 4: Run Windows Troubleshoot

Apart from CHKDSK and SFC, Windows includes a utility designed to assist in troubleshooting hard drive issues. Here’s how to fix a cyclic redundancy check error with the aid of this tool:

Step 1: Press Win + R to bring up the Run dialog box. Then, write “msdt.exe -id DeviceDiagnostic” and click “OK.”

Step 2: Click “Next” to allow the troubleshooter to scan for hardware issues.

Method 5: Reformat Your Disk

Reformatting will create a new, clean file system on the affected disk, which can resolve the error message “Data error (cyclic redundancy check).” The detailed steps are as follows:

Step 1: Start by locating the problematic drive in File Explorer. Right-click on it followed by selecting the “Format” option.

Step 2: A format window will appear. Here, you need to choose a proper file system and other relevant options. Click “OK” to initiate the formatting process.

Method 6: Contact Professionals

If you’ve tried all the above fixes but still see a data error cyclic redundancy check when trying to download game, it may be a sign that your hard drive has serious hardware issues. In such cases, the safest option is to take the drive to a professional repair shop. Technicians there can replace worn components, resolve connection issues, or clean internal parts that may be affecting the drive’s performance.

Part 5: How to Avoid a CRC Error in the Future?

A cyclic redundancy check error can be frustrating, but many of these errors are preventable with some simple habits.

• Always safely eject external drives before unplugging.
• Monitor your drive’s health with CrystalDiskInfo.
• Back up important files regularly.
• Avoid interrupting downloads or file transfers.
• Use high-quality cables and avoid damaged cords.
• Regularly scan your drives for errors using Windows tools like CHKDSK.

Conclusion

Now you should no longer be puzzled by the error message “Data error (cyclic redundancy check).” Following a proper cyclic redundancy check error fix, such as running CHKDSK, repairing system files, or reformatting the disk, can prevent permanent data loss. And if you do end up losing files, software like Tenorshare 4DDiG can help retrieve them with just a few clicks.