If you are working within a Windows PE (Preinstallation Environment) or a recovery console, you might be using an older version of DISM that doesn't support the flags you are typing.
In the Administrator Command Prompt, type the following: dism /image:C:\ /cleanup-image /revertpendingactions Restart your computer. Try running your original /restorehealth command. 4. Check Your Windows Version erro 87 dism
DISM /Online /Cleanup-Image /CheckHealth (Quick check for corruption). If you are working within a Windows PE
📍 90% of Error 87 cases are solved by simply adding spaces before the slashes. Double-check your formatting before trying more complex system restores. If you'd like to troubleshoot further: Provide the exact command you typed Mention your Windows version (e.g., Windows 10, Windows 11) erro 87 dism
If DISM continues to return Error 87 despite correct syntax, the underlying registry keys or system files responsible for servicing the OS may be corrupt. In this scenario, the most efficient resolution is an .