DISM Error 87 in Command Prompt

DISM (Deployment Imaging Service and Management) is a tool used for servicing and preparing Windows images. Error 87 typically occurs due to incorrect command usage or syntax issues. Here’s a look at what causes this error and how to fix it.

Causes of DISM Error 87

  • Incorrect Command Syntax: This error often arises from typing mistakes in the command. DISM commands are sensitive to spaces and parameters, so even a minor typo can lead to issues.
  • Running Without Administrator Privileges: Some commands require administrative access to execute properly, and without it, the tool may not work as expected.
  • Incompatible Windows Version: This error may also occur if you’re trying to use parameters not available for your current version of Windows.

How to Fix DISM Error 87

1. Check the Command Syntax

Most often, Error 87 is caused by minor typos. Ensure that your command is correctly written with no extra spaces or incorrect characters. For example, try the following:

DISM /Online /Cleanup-Image /ScanHealth

Make sure the command uses proper spacing and character case.

2. Run Command Prompt as Administrator

To use DISM commands, open Command Prompt with administrator privileges:

  • Press Win + X and select Command Prompt (Admin) or Windows PowerShell (Admin).

3. Verify Compatibility of Parameters

Some parameters aren’t supported in all Windows versions. Double-check that the parameters you’re using are available in your Windows version. Refer to the Microsoft documentation for DISM to confirm command compatibility.

4. Run the Command in Safe Mode

Occasionally, antivirus or third-party software can interfere with DISM operations. Try restarting your computer in Safe Mode and then running the command again.

Examples of Common DISM Commands for Repair

  • DISM /Online /Cleanup-Image /RestoreHealth: Fixes detected issues within the Windows image.
  • DISM /Online /Cleanup-Image /CheckHealth: Checks for any corruption in the Windows image.