To install and set up roulette software on your computer or mobile device, start by visiting the official website of the chosen casino or software provider. Download the appropriate application for your device, ensuring it's compatible with your operating system. Follow the installation prompts, and once installed, launch the software. Create an account or log in if you already have one. You may need to verify your identity and make a deposit to start playing. Ensure you have a stable internet connection for the best experience.