Fixed | Dism Error 87

How to Fix DISM Error 87: "The Parameter is Incorrect"

If you are trying to repair your Windows system image using the Deployment Image Servicing and Management (DISM) tool, seeing Error 87 can be frustrating. The error message usually reads:

Quick checklist (most common causes)

• Typo or wrong command syntax (most frequent).
• Running DISM on unsupported Windows build or using incorrect switch order.
• Using DISM 32-bit on a 64-bit OS or vice versa (rare).
• PATH/environment issues or corrupted system files.
• Running DISM without administrative privileges.
• Attempting to use an online repair command while offline, or vice versa.
• Using an unsupported image file or wrong mounted-image context.

Step-by-Step Fixes

1. Check the Command Syntax

Run DISM with the correct capitalization and spacing: dism error 87 fixed

Correct order: