set up, setup, Setup

Use as a verb to describe the process of preparing hardware and installed apps for initial use. Two words as a verb, one word as an adjective and a noun. Don't hyphenate.

Capitalize Setup when it refers to the Setup program.

Examples
Unpack everything before you set up your computer.
The setup time is about 15 minutes.
Your office setup should be ergonomically designed.
Run Setup before you open other apps.