"Gotcha," Mark grinned. He exited diskpart and prepared the corrected command. This time, he wouldn't use /Online . He would point the tool directly to the source installation file (install.wim) located on his trusty USB recovery drive (which he knew was mounted as F:) and tell it to fix the broken Windows drive (D:).
Open Command Prompt as Administrator again and retry your original DISM command. Method 4: Restart the Windows Update Service
Double-click the ISO to mount it as a virtual drive (e.g., Drive E: ). Open the Administrator Command Prompt. Run the targeted repair command targeting the source file: dism error 87 fixed
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If you are running an older operating system (especially Windows 7 or 8.1), the default DISM tool does not support the /LimitAccess or /Source parameters in the same way Windows 10 does. "Gotcha," Mark grinned
Omitting necessary spaces before forward slashes ( / ).
DISM /Online /Cleanup-Image /CheckHealth He would point the tool directly to the
If the Windows Modules Installer service is stopped, DISM cannot perform its cleanup tasks. Press Win + R , type services.msc , and press . Scroll down and double-click Windows Modules Installer . Set the Startup type to Automatic . Click Start , then click OK . Step 3: Run Windows Update
) is the primary trigger. Beyond typos, the error occurs if: How To Fix DISM Error 87 (Cleanup-Image Option is Unknown)