Tried what you have suggested and I still have the same problems. Avast installs fine with no problems but at the end of the installation process where it states a quick scan will be launched once you press the done button after instaltion nothing happens. If you press the avast shortcut button on your desktop avast launches but you still get the http://gyazo.com/9746ed6e0adae1cc5b83355cec7e8459 error screen.