Obtaining and Installing the IBM Installation Manager
WebSphere Express 8.5.5, WebSphere for Developers 8.5.5, and WebSphere 9.0 must be installed using the IBM Installation Manager
From the IBM web site, locate and save the download the IBM Installation Manager.
Extract the contents of the downloaded file.
In the extracted directory, run
install.exe
and follow the prompts to install the IBM Installation Manager.