How to Remove Annoying GoogleUpdate.exe Background

STEP 2:
Now we'll need to remove the scheduled task created for GoogleUpdate.exe from our system. Open "Scheduled Tasks" or "Task Scheduler" from Control Panel or Programs menu. You can also launch it by using "taskschd.msc" command in RUN dialog box or by opening "%windir%\Tasks" folder.
Now look for the "GoogleUpdateTaskUser" task and delete it.
Windows XP:










STEP 3:
Now the last step! We'll need to remove the "GoogleUpdate.exe" file permanently so that it doesn't add its entry again in startup.
Go to following folder (Copy and paste the folder path in RUN dialog box and press Enter):

Windows XP:
%USERPROFILE%\Local Settings\Application Data\Google\Update
Windows Vista and later:
%USERPROFILE%\AppData\Local\Google\Update

In the above mentioned folder, you'll find the "GoogleUpdate.exe" file. Just delete the file.
PS: If you can't find "GoogleUpdate.exe" file in above mentioned folders, try to look the file in following folders:

32-bit (x86) Windows editions:
C:\Program Files\Google\Update\
64-bit (x64) Windows editions:
C:\Program Files (x86)\Google\Update\