When installing CA Spectrum, the following error message shows:
Installer User Interface Mode Not Supported
The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option followed by the UI mode identifier. The valid UI modes identifiers are GUI, Console, and Silent.
This is a Microsoft Windows compatibility issue. To resolve the problem, right click the Spectrum executable that you are using and select "Properties". Navigate to the Compatibility Tab and select the "Run this program in compatibility mode for:" option and set it to another Windows version:
Click Apply and then OK. You can now relaunch the CA Spectrum install.