Installation
Watir runs on Windows machines and works with the Internet Explorer web browser, versions 6 and 7. We recommend using Ruby 1.8.5-24 or Ruby 1.8.6-26 final (or later). Watir runs on Windows 2000, XP, Server 2003 and Vista. Make sure you are logged in as Administrator while installing Ruby and Watir.
Step 1 - Install Ruby
Step 2 - Install Watir
Step 3 - Run the Watir Unit Tests (optional)
Step 4 - Install the IE Developer Toolbar (recommended)