You didn't mention which Windows operating system you're using, but the differences in these instructions for Windows XP or Windows 7 will be minor.
To disbale the GoogleUpdater service:
- Click the Start menu
- Click Run
- Type in `services.msc' and the Services MMC will open
- Now you will need to locate the GoogleUpdater service in the list, then double-click on it to open the "Properties" window
- To stop the GoogleUpdater from running when you boot your computer, change the Startup Type to "Disabled"
- To stop the GoogleUpdater service right now, click the "Stop" button.
Now, you also want to delete the Scheduled Task that runs the GoogleUpdater:
(For Windows XP)
- Navigate to the Control Panel
- Go into Scheduled Tasks
- If a task called "GoogleUpdateTaskUser" exists, delete it.
(For Windows Vista / 7)
- Navigate to the Control Panel
- Go into Administrative Tools
- Go into Task Scheduler
- If a task called "GoogleUpdateTaskUser" exists, delete it.