In this dialog window you will be presented with important information about the installation, such as system requirements that are not met.
ImageMagick will be used to increase performance when images are
scaled, for instance in an Intrexx image gallery. If you click, in the
lower area of the setup dialog, on the link Click here to view
important installation notes, you will have the ability in the
subsequent dialog to install ImageMagick. You can find additional
information on this topic in the documentation of ImageMagick.