An installation. (Usage originated as a truncated form of the word installation.)
Installer. A software utility that installs an application.
To connect, set up or prepare something for use, often specifically (in Computing) to transfer software onto a device's permanent storage and put it in a state where it is ready to be run when needed, usually decompressing it if necessary and performing any necessary pre-first-run configuration.
To admit formally into an office, rank or position.
To establish or settle in.
To cause something to be removed or replaced in its role; to displace, overturn.
To upset the composure of (in various ways); to astound, shock, or unsettle.
To remove from some (especially political) position or office; to dethrone.
To come out or off of a seat.
To remove or dislodge from a seat (especially referring to horse riding).