What is the difference between Platform Installer and Complete Bundle that available on the download page.
The Platform Installer is online installer which, during the installation will download only the components you have chosen to install. Complete Bundle is the same offline installer. It will download all the components and during the installation will install only the chosen ones.
So, if the machine where you will install the Infragistics Controls has connection to internet it is recommended to use the Platform Installer due to its smaller size, otherwise you should use the Complete Bundle if there is no internet connection.
Please let me know if you need any further assistance.
Regards, Ivan Kitanov