While installing IBM WebSphere Portal Express 8 on a Windows 2008 R2 server I encountered an error when I wanted to deploy the IBM Installation Manager.
Everything seemed to run smoothly but at the end the installer failed and gave me the following error.
“Error removing intermediate unpacked files at D:\IBM\Installation Manager………”
First I tried a newer version of the IIM. The one packaged with WP 8 Express is 1.5.2 but
I encountered the same issue with the 1.7.0 version. I also noticed that the installation folder remained completely empty after the installation failed. Only the directory IBM and the directory InstallationManager were created.
Later on I found out that on the server ARCserve backup services were running. These services conflicted with the the installation of IIM. After stopping these services I was able to successfully complete the installation of the IBM Installation Manager.