In this environment, ensure you are targeting the correct Windows partition.
Use sfc /scannow instead, or use the "System Update Readiness Tool" provided by Microsoft. 5. Use the Correct DISM Version
DISM (Deployment Image Servicing and Management) is a command-line tool used to service and prepare Windows images. Error 87 is a generic system error code indicating In the context of DISM, this error typically occurs when a command syntax is invalid, the tool cannot locate the required source files, or there is a mismatch between the Windows build version and the DISM version being used. erro 87 dism
Sometimes a "pending" update or a failed installation locks the DISM tool, leading to a parameter error. You can force the system to clear these pending actions.
Even if it finds errors it can't fix, try running the DISM command again immediately after. Summary Table: Quick Fixes Add a space before every / symbol. No Admin Rights Right-click CMD and "Run as Administrator." Wrong OS /RestoreHealth does not work on Windows 7. Pending Updates Run the /revertpendingactions command. In this environment, ensure you are targeting the
:If commands consistently fail with Error 87 even with correct syntax, your system image or user profile may be severely damaged. You can perform a "Repair Install" by downloading the Windows Media Creation Tool and selecting "Keep all files and apps" during setup. DISM Error 87 in Windows 10 - Microsoft Q&A
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth (Repairs the image using Windows Update).