By default, Google downloads a small setup file that installs Google Earth, Google Chrome and Google Updater. Here's how to download standalone installer for Google Earth:
- Go to Google Earth's homepage and click on download Google Earth
- At the bottom of the page, there's a small message: "Customize your installation with advanced setup." Click on “advanced setup”.
- Disable "Allow Google Earth to automatically install recommended updates"
- Click on "Agree and download" and you'll get the offline installer. Here’s the direct download link for Windows version.