Software Installation Messages
Setup wants to restart the machine. For your information only, as Setup has installed a file that will only be useable after a restart. Let it do it. This may even occur while Setup is loading itself.
Setup wants to install a file, but it is not newer than a file by the same name already on the machine. Keep the newer file, the one already on the machine; do not use the older file from the CDROM.
Setup wants to remove a shared file from the machine. Unless you are an IT person who knows what they are doing, let shared files remain. They do no harm and do not occupy much space.
Setup fails in the installation. Try once more, because sometimes what it has installed will make the second try work OK.
Setup asks you to UnZip something or gives you a window with an UnZip button. You use UnZip in this case to complete the installation.