When installing ArcIMS or ArcExplorer 3.1 on Microsoft Windows NT or Windows 2000 the following messages may occur:
"ArcIMS3.0 is installed, remove first... " or
"ArcExplorer3.0 is installed, remove first.."
ArcIMS 3.0 and 3.1 (ArcIMS or ArcExplorer-Java Edition) cannot be installed on the same computer. The 3.1 Windows setup will detect if 3.0 is installed. If it is, a message will display and the install must be cancelled.
Warning: 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.
Warning: This should be done by a system administrator.