Orange Popup

Hello. I have a Very crazy question, I use several Codecs and they are for audio and video. Why is it when they are un-installed and requires a Re Boot, when avast opens up after the removal the Popup that avast shows is Orange and Empty with no Text showing, is this a warning or program error. When I click it it just vanishes and does nothing. Please help since I update my codecs sometimes when certain programs are unable to work like they did before the update.