DISM Error 23 Data Error, How to Fix It
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- DISM Error 23 means “Data error (cyclic redundancy check).” Windows could not read some data reliably, which often points to a failing drive, bad sectors, or a damaged image.
- Back up your files first. Then run chkdsk, check the drive’s health with the maker’s tool, and try DISM and sfc /scannow.
- If the drive fails a long diagnostic test, replace it. If the drive is healthy, reinstalling Windows from bootable media usually fixes the system files.
You tried to reset your PC, or ran DISM or the System File Checker, and the process stopped with Error 23. The message “Data error (cyclic redundancy check)” is more serious than a simple setting problem, so the first step is protecting your data. This guide explains what the error means and gives a safe order of fixes, from checks that change nothing to reinstalling Windows.
1. What Error 23 Means

- A cyclic redundancy check (CRC) is how Windows verifies that data it reads matches what was written.
- Error 23 means the check failed, so some data could not be read correctly.
- Common causes are bad sectors on the drive, a failing SSD or hard disk, a loose cable, or damaged system files.
- People report it when DISM scans stop partway, for example around 85 percent, or when sfc /scannow stalls.
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2. Step 1: Back Up Your Files

- Copy important files to an external drive or cloud storage right away.
- If Windows will not start, boot from a bootable USB and copy files from another PC or recovery environment.
- Do not run repeated repairs on a drive that is failing before you have a backup.
3. Step 2: Check the Drive

- Open Command Prompt as administrator and run chkdsk C: /f /r. Allow a restart if asked. It can take a long time.
- Run the drive maker’s diagnostic tool, such as a long or extended test. In Microsoft’s forum, an independent advisor suggested a long generic test and replacing the drive if it fails.
- Reseat SATA or power cables on a desktop and test another port.
- Look at the drive’s SMART status in the manufacturer’s tool.
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4. Step 3: Run DISM and SFC in the Right Order

- Open Command Prompt as administrator.
- Run DISM.exe /Online /Cleanup-image /Restorehealth and wait for the success message.
- Then run sfc /scannow and wait until verification reaches 100 percent.
- Restart. If DISM cannot reach Windows Update, Microsoft documents using /Source with a repair source and /LimitAccess.
5. Step 4: Reset or Reinstall Windows

- Try Settings, System, Recovery, Reset this PC with Keep my files.
- If Reset fails, create bootable Windows 11 media with the Microsoft tool and choose a clean install.
- A clean install erases the drive, so make sure your backup is complete.
- If a new install fails or the error returns, the drive is likely failing and should be replaced.
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Frequently Asked Questions
Does DISM Error 23 mean my hard drive is dead?
Not always, but it is a warning sign. Test the drive with the manufacturer’s tool before you trust it again.
Will I lose my files when I reset?
Reset this PC has a Keep my files option, but you should back up first anyway, since errors can interrupt the process.
Is it safe to run sfc /scannow?
Yes. It is a Microsoft tool. Do not close the window until the scan reaches 100 percent.
What if chkdsk loops or stops?
That can mean serious disk problems. Back up what you can and test or replace the drive.
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Resources
- Microsoft Support: Use the System File Checker tool
- Microsoft Support: Reset your PC
- Microsoft: Download Windows 11
Last updated: October 22, 2026.
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