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OCLC Support

How do I completely uninstall the ILLiad Client so it can be reinstalled?

  • During install the program prompts to modify. repair or remove
  • Using any of the suggested option gives an error
Applies to
  • All version up to 9.0


  1. Navigate to C:\Program Files (x86)\InstallShield Installation Information.
  2. Search subfolders and look for the setup.exe that is published by Atlas Systems. 
  3. Delete the entire parent folder that contains the identified setup.exe
  4. Delete the C:\Program Files (x86)\ILLiad folder so it will be reinstalled with the correct version.
  5. Attempt to reinstall the correct version of ILLiad.
Additional information

ILLiad install instructions

Contact OCLC Support for more information.

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