Wow, were not surprised, NAV is a pig to remove at times.

I don’t know if this Application Launcher is related to avast as there is no reference to avast in the pop-up. Is there something that makes you believe it is related to avast (other than it only happened after you installed avast, other errors, etc.) ?

I get a lot of hits for Application Launcher in a google search, http://www.google.com/search?q=Application+Launcher.

Welcome to the forums.