What is DISM error 87 and how to resolve it

DISM (Deployment Image Servicing and Management Tool) error 87 typically indicates that there is an issue with the command syntax or the parameters you provided when running the DISM tool. In other words, it suggests that there might be a problem with the way you entered the command. Here’s how to resolve DISM error 87:

1. Check Command Syntax: Double-check the syntax of your DISM command. Ensure that you have entered it correctly, with proper spacing and the correct order of parameters. Typos or incorrect syntax can lead to error 87.
2. Run as Administrator: DISM commands often require administrative privileges to make changes to the system image. To run DISM as an administrator:
   • Open Command Prompt as an administrator. To do this Open the Run box by pressing Win + R, type “cmd,” and press Ctrl + Shift + Enter 
   • Re-enter your DISM command and press Enter.
3. Use Quotes for Paths: If your command includes file paths, make sure you enclose them in double quotes, especially if the paths contain spaces. For example:

DISM /Online /Cleanup-Image /RestoreHealth /source:"D:\sources\install.wim"

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4. Ensure Correct Parameters: Verify that you are using the correct DISM parameters for your intended operation. Different DISM commands require specific parameters, and using the wrong ones can trigger error 87.
5. Update Windows: Ensure that your Windows operating system is up to date with the latest updates. Outdated or incompatible system files can sometimes lead to DISM errors.
6. Check for System Corruption: If the error persists, it’s possible that your Windows system image itself is corrupted. You can run the following command to check for system file corruption using the System File Checker (SFC):

SFC /scannow

After running SFC, restart your computer and then attempt the DISM command again.

Read Also: Revitalize Your Windows 10 Image with DISM & SFC Command [2023 Guide]

7. Use Offline Mode: In some cases, using the DISM tool in offline mode might resolve the error. To do this, you’ll need to boot from a Windows installation media (such as a bootable USB drive or DVD) and run the DISM command from there. Make sure you specify the /Offline parameter and provide the correct image source.
8. Seek Expert Help: If none of the above solutions work, it may be a more complex issue with your Windows installation or system image. In such cases, it’s advisable to seek assistance from a knowledgeable IT professional or Microsoft support.

By following these steps and ensuring the correct syntax and parameters, you should be able to resolve DISM error 87 and successfully use the tool to perform various maintenance and repair tasks on your Windows system.

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