Currently most software installers have a small bootstrap and during the actuall install will download only the files that are actually needed.
Often that is not convenient: slow or no network connection, repeated installs in a test environment, etc.
Luckily, a lot of software does have an offline installer (a.k.a. standalone installer).
Being no exception Google Chrome has two offline installers: one single user install, and one for all users on the same Windows machine.
–jeroen
via: Alternate (offline) Google Chrome installer (Windows) – Google Help.
