Problem: Cannot install ArcGIS 9 ArcObjects Desktop Developer kit


When attempting to install the ArcGIS Desktop Developer kit for ArcGIS 9, an error may occur, stating that a previous version is installed. The previous version may not show up in the Windows Add/Remove programs interface.


Residual registry entries exist for the older version of the developer kit.

Solution or Workaround

The instructions below include making changes to essential parts of your operating system. It is recommended that you backup your operating system and files, including the registry, before proceeding. Consult with a qualified computer systems professional, if necessary.

Esri cannot guarantee results from incorrect modifications while following these instructions; therefore, use caution and proceed at your own risk.
Remove the residual entries for ArcObjects Developer's Kit.
  1. Start the Windows Registry editor; click Start > Run, type 'regedit' and press Enter.
  2. Navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall\
  3. Beneath this folder, there are many folders with long, alphanumeric names. Find the folder named as follows:
  4. Remove this folder.