Dism Error 87 Fixed [ SIMPLE ]

Running the Command Prompt without Administrator rights.

Before diving into the fixes, it helps to understand why this happens. The most common culprits include: Missing a space before a forward slash ( / ). dism error 87 fixed

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. Running the Command Prompt without Administrator rights

DISM requires elevated permissions to modify system files. If you run it in a standard terminal, it will fail. Click the menu and type cmd . Right-click Command Prompt and select Run as Administrator . Try running your DISM command again. Fix 3: Run the Windows Update Troubleshooter If you are trying to use the /RestoreHealth

Use dism /online /cleanup-image /scanhealth (Note: Windows 7 does not support the automatic repair feature of RestoreHealth). Summary Table Likely Cause Missing Spaces Add a space before every / No Admin Rights Right-click CMD > Run as Administrator Pending Updates Run Windows Update Troubleshooter Wrong OS Version Ensure you aren't using Win 10 commands on Win 7

Re-type the command slowly, ensuring there is a space before every / character. Fix 2: Run Command Prompt as Administrator

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