Avast may be a good product but I cannot stress how strongly I disagree with your decision to bundle Chrome and Google toolbar in with the installation. If there’s an option not to install these I certainly didn’t see it. If you want to include other products they should be opt-in only otherwise you are bundling yourself, in the users mind, along with so much other software out there which installs a ton of unwanted crapware on your computer.
Its on the very first page of the installation.
See attached image, click to expand; did you not see this ?
If not how did you install avast, e.g. did you previously have avast installed (update from the UI) or another AV previously (clean install of avast) ?