Google Earth has now been included as part of Google Pack, which has Google Updater as one of its core program. There is a solution for people who need Google Earth but not require or like Google Updater to automatically install and update Google Earth for them.
In Google Earth Help topic related to installation and uninstallation, a direct download link to latest version of Google Earth is provided.
The standalone installer of latest current version of Google Earth:
PC: Download Google Earth Offline Standalone Installer (Updated link)