Avast Not Talking

I have been using avast on my computer for 2 years and up until about 4-5 months ago the software would announce the updates and any other notifications, but now the software is silent, have uninstalled completely with Revo Uninstaller and cleared all the registry keys and files with revo but no difference every install no voice, The Only computer that does this is my laptop.Never shows up in mixer or anything. Any Help would be appriciated!