Whoa, this entry should be deleted from the file:
[Google Update Files*]
LangSecRef=3022
DetectFile=%Localappdata%\Google\update\
DetectFile=%userprofile%\local settings\google\update\
Default=false
FileKey1=%localappdata%\google\update\|*.*|REMOVESELF
Filekey2=%userprofile%\local settings\google\update\|*.*|REMOVESELF
It doesn't remove GU's temporary files, it destroys the entire updater, damaging Google Chrome, Google Earth, etc. - they can no longer even check for newer versions if this is done.