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Installation Not Successful Error

Sadek Akl
  • Updated
 

Troubleshooting Installation Failure When Updating to Mozaik 14.1

If you encounter an installation error while updating Mozaik to version 14.1, the issue is typically caused by Windows security restrictions preventing the installer from modifying required system files.

The error message will reference a specific file—most commonly:

WriteableBitmapEx.Wpf.dll

and will display a message similar to:

Screenshot 2025-12-05 115658 Mozaik Installation Error Message.jpg

“The installation was not successful. Access to the path 'WriteableBitmapEx.Wpf.dll' is denied.”

This indicates that Windows is blocking access to a file needed for the update.

Primary Resolution: Disable Windows UAC (User Account Control)

Disabling User Account Control temporarily allows the Mozaik installer to properly update system files.

Step-by-Step Instructions

  1. Click Start and type UAC
  2. Open Change User Account Control settings
  3. Move the slider all the way down to Never notify
  4. Click OK
  5. If prompted, click Yes
  6. Restart your PC (recommended)

After restarting, re-run the Mozaik 14.1 installer. In most cases, the installation will complete successfully.

Important: Once installation is complete, we recommend re-enabling UAC to maintain normal Windows security settings.

Secondary Resolution: Manually Remove the File

If disabling UAC does not resolve the issue, you can manually remove the file referenced in the error message and then re-run the installer.

Step-by-Step Instructions

  1. Close the Mozaik Installer
    Click Finish when the error appears.

  2. Navigate to the File Location
    Open File Explorer and go to:

    C:\Mozaik\System\

  3. Locate the File Referenced in the Error
    Look for the file mentioned in the error message (for example, WriteableBitmapEx.Wpf.dll).
  4. Delete the File
    Right-click the file and select Delete.
  5. Run the Installer Again
    Re-launch the Mozaik 14.1 installer. The installation should now complete successfully.
image

Need Additional Help?

If the issue persists or you encounter a different file-related error, please contact the Mozaik Help Desk and include:

  • A screenshot of the error message
  • The installer version you are running
  • The name of any files mentioned in the error

We’re here to help ensure your update installs smoothly.

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