The Google Chrome updates initiated from the Avast Software Updater always fail with "Error". Nice, eh?
Not to worry. Just start up Google Chrome, click the Customize button (in the far upper right corner) and then select "About Google Chrome". That will cause Chrome to check for an update and install it if available.
Google Chrome is fairly aggressive about finding and installing updates. So if you use it regularly it will take care of itself. You should just ignore the Avast Software Updater for Google Chrome.
That's what I do.
--Larry