I just updated Avast to the new version 2014.9.0.2016 through the program.
Lo and behold, after the reboot I find DropBox has also been installed with no warning. I don't want DropBox. I don't need DropBox.
I do know enough to watch installation processes, I always use custom installs and read every screen carefully. I never download anything from CNet because of the way they use installation wrappers.
To install an unrelated program WITH ABSOLUTELY NO WARNING is simply unconscionable.