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Fix DISM Error 87 on Windows 11: Step-by-Step Guide

By metsPosted on Posted in Sport Gear

Fix DISM Error 87 on Windows 11: Step-by-Step Guide

If you’re encountering the DISM error 87 on Windows 11, it can prevent you from repairing or maintaining your system images effectively. This guide will walk you through the causes of this error and provide clear, actionable steps to fix it, ensuring your Windows 11 system runs smoothly again. Before starting, make sure you have administrator privileges on your PC, as elevated permissions are necessary to run DISM commands successfully.

What You’ll Need

  • Administrator access to your Windows 11 PC
  • Working internet connection (optional, for online repairs)
  • Basic familiarity with command prompt or PowerShell

Step-by-Step

  1. Open Command Prompt as Administrator
    • Click on the Start menu, type “cmd” or “Command Prompt”.
    • Right-click on the Command Prompt app and select “Run as administrator”.
    • If prompted by User Account Control (UAC), click “Yes” to grant permissions.
  2. Check your DISM version
    • Type `dism /?` and press Enter.
    • This confirms that DISM is accessible and functioning at some level.
  3. Run the DISM scan with the correct syntax
    • Type the command: `DISM /Online /Cleanup-Image /RestoreHealth`
    • Press Enter.
    • If you encounter Error 87, proceed to the next step.
  4. Ensure the command syntax is correct
    • Sometimes, Error 87 occurs due to incorrect command syntax.
    • Verify you entered exactly: `DISM /Online /Cleanup-Image /RestoreHealth`
    • If you used additional parameters or typos, correct them and try again.
  5. Use the `/RestoreHealth` with the `/Source` parameter
    • If the error persists, specify a known good source.
    • First, create or download a Windows 11 ISO matching your build.
    • Mount the ISO, note the drive letter (e.g., D:).
    • Run: `DISM /Online /Cleanup-Image /RestoreHealth /Source:D:\sourcesoot.wim /LimitAccess`
    • Replace D: with your actual drive letter.
  6. Run the System File Checker (SFC) tool
    • Type `sfc /scannow` and press Enter.
    • This can fix issues that DISM cannot resolve alone.
  7. Restart your computer and re-run DISM
    • After completing the above steps, restart your PC.
    • Open Command Prompt as administrator again.
    • Run `DISM /Online /Cleanup-Image /RestoreHealth` once more.

Common Mistakes

  • Using incorrect command syntax or typos in the DISM command.
  • Running DISM without administrator privileges, which can cause permission errors.
  • Providing an invalid or mismatched source when specifying `/Source`.
  • Not mounting the correct ISO or using an outdated or corrupted source image.
  • Ignoring prerequisite system updates that might be necessary for DISM to work properly.

Tips

  • Always run Command Prompt as administrator for system repair commands.
  • If you encounter persistent errors, consider using the Windows Repair Tool or Media Creation Tool to refresh your system.
  • Keep your Windows 11 updated to ensure compatibility with DISM and related tools.
  • Back up important data before performing system repairs to prevent potential data loss.
  • Use the latest Windows 11 ISO from the official Microsoft website for source files.

Troubleshooting

If the above steps do not resolve the DISM Error 87, try the following:

  • Run the Windows Update Troubleshooter: Go to Settings > System > Troubleshoot > Other troubleshooters > Windows Update, then click Run.
  • Reset Windows Update components manually by stopping services, deleting temporary files, and restarting services.
  • Use the Windows Media Creation Tool to create a bootable USB or ISO and perform a repair installation.
  • Check your system logs for specific error messages that can give clues about underlying problems.
  • If all else fails, consider a clean install of Windows 11, but ensure you back up your data first.

Frequently Asked Questions

1. What causes DISM error 87 on Windows 11?

This error usually occurs due to incorrect command syntax, insufficient permissions, corrupted system files, or incompatible source files.

2. Can I fix DISM error 87 without reinstalling Windows?

Yes, most issues can be resolved by correcting command syntax, running as administrator, and repairing system images using DISM and SFC tools.

3. Do I need an ISO file to repair Windows 11 with DISM?

Having a matching Windows 11 ISO is recommended if online repair methods fail, as it provides a reliable source for restoring system files.

4. Is it safe to run DISM commands?

Yes, when used correctly with proper syntax and permissions, DISM commands are safe and intended for system maintenance and repair.

5. How long does a DISM scan take?

The process can take anywhere from several minutes to over an hour, depending on system speed and the extent of corruption.

6. What should I do if DISM keeps failing?

Try using a different source, run the System File Checker, update Windows, or perform a repair install if necessary.

Fixing DISM error 87 on Windows 11 can be straightforward when following the correct procedures. Remember to always back up your data before performing system repairs and ensure you have the latest updates and source files for best results.

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Fix DISM Error 87 on Windows 11: Step-by-Step Guide
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