Versions

2.4.1536.6592.beta	20.37%
2.4.1441.4352.beta	72.22%
2.0.734.29932.beta	7.41%

There are 3 versions of googleupdaterservice.exe in the wild, the latest version being 2.4.1536.6592.beta. It is started as a Windows Service called 'gusvc' with the name 'SYSTEM\CurrentControlSet\Services\gusvc'. In addition, it is run under the context of the SYSTEM account with extensive privileges (the administrator accounts have the same privileges). A job within the Windows Task Scheduler is added to execute this process of a specific schedule during installation of the program. The average file size is about 164.13 KB. The file is a digitally signed and issued to Google Inc by VeriSign. Some variations of the file have been seen to be installed with the program Google Earth from Google Inc. During the process's lifecycle, the typical CPU resource utilization is less than 0.01% with the maximum memory reaching around 3.38 MB.

Google products use a process called Google Update to periodically check for updates. This process sends information, such as version number, language, operating system, and other installation or update-related details, back to Google servers. Google Updater is a Windows Service which runs in the background of Windows and automatically starts up when your PC boots. It checks for software udpates and automatically downloads and installs them if found.