Dism Error 87 Fixed May 2026

If you are trying to use the /RestoreHealth switch on an older version of Windows (like Windows 7), you will get Error 87 because that specific parameter didn't exist yet.

90% of Error 87 cases are caused by missing spaces. DISM is very picky about how commands are formatted. Every forward slash must have a space it. The Wrong Way: dism/online/cleanup-image/restorehealth The Right Way: dism /online /cleanup-image /restorehealth

Since DISM often uses Windows Update to download "healthy" files to replace corrupted ones, a bug in the update system can trigger Error 87. Press Win + I to open . dism error 87 fixed

Running the Command Prompt without Administrator rights.

A glitchy Windows Update service can sometimes block DISM from connecting to its source files. Fix 1: Check Your Syntax (The Most Common Solution) If you are trying to use the /RestoreHealth

By following these steps, you should be able to bypass Error 87 and successfully repair your Windows system image.

Use dism /online /cleanup-image /restorehealth Every forward slash must have a space it

How to Fix DISM Error 87: A Step-by-Step Guide If you’ve tried to repair your Windows image using the Deployment Image Servicing and Management (DISM) tool only to be met with you’re not alone. This is one of the most common DISM errors, and while it looks intimidating, it usually boils down to a simple syntax mistake or a service glitch.