The "Windows Modules Installer" service is disabled. You have to wake it up by searching for Services , right-clicking it, and setting its startup type to Automatic .
Set the to Automatic and click Start if the service is stopped. Click OK and try running DISM again. 4. Troubleshooting by Windows Version
Work through these solutions sequentially until the issue is resolved. Fix 1: Check and Correct the Command Syntax dism error 87 fixed
Fortunately, DISM Error 87 is rarely a sign of hardware failure. It is almost always caused by user entry mistakes or minor software glitches. This comprehensive guide walks you through the exact steps to fix DISM Error 87 permanently. What Causes DISM Error 87 in Windows?
Run the following command (replace X with the actual drive letter of your mounted ISO): DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:WIM:X:\sources\install.wim:1 /LimitAccess The "Windows Modules Installer" service is disabled
Sometimes, the Command Prompt environment introduces odd parsing errors. PowerShell handles arguments differently and may bypass Error 87 entirely.
Ensure you are pointing to the correct file inside your installation media, usually located in the sources folder. Click OK and try running DISM again
Beyond simple typos, the error often points toward a lack of authority. Windows protects its core files through layers of security, requiring "Administrative Privileges" for any tool that modifies the system image. When a user attempts to run DISM from a standard prompt, the system rejects the command with Error 87, effectively telling the user they do not have the keys to the engine room. Resolving this is a matter of protocol: one must simply right-click the command prompt and choose to run it with the full weight of administrative power.
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Error: 87 – The option is unknown. For more information, refer to the help by running DISM.exe /?.