Ensure you are targeting the correct drive letter. In recovery mode, your Windows drive might be D: instead of C: . Use the full path to the DISM executable if necessary. 6. Run SFC First
In this environment, ensure you are targeting the correct Windows partition.
📍 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
When running /RestoreHealth , DISM attempts to download repair files from Windows Update. If the local image version is newer than the files available on the server, or if the designated source (WIM/ESD file) does not match the installed version of Windows, Error 87 is generated.
Sometimes the component store is corrupted, preventing DISM from parsing parameters correctly. Run the following command to clean the superseded components: Ensure you are targeting the correct drive letter
DISM /Online /Cleanup-Image /RestoreHealth /Source:WIM:D:\sources\install.wim:1 /LimitAccess
The most frequent cause is a typographical error in the command string. If specifying a source
Right-click the application and select .
The most common cause of Error 87 is a simple typo. DISM commands are extremely sensitive to spaces.
DISM /Online /Cleanup-Image /RestoreHealth (Repairs the image using Windows Update).
If specifying a source, ensure the syntax includes the drive letter and the install.wim path correctly: