Recently, I have been getting pop-up messages from Avast asking me to renew my subscription. Not such a bad thing, although they are annoying. However, what is extremely frustrating is that these pop-up do not have a way to dismiss the ad except by finding its icon on the task bar and closing it from there. I am pretty sure this lack of a "close" button on the ad itself is an accessibility issue - no x, no window closing link ("No thanks", or "Not right now") and moreover there is no way to specify - "do not show this ad again" so it keeps coming back day after day. If it is not an accessibility issue, it certainly is a nuisance bit of spam and not appreciated - to the degree that I am considering not renewing my subscription again. Please ensure that if you pop up any notifications in future, they have a way to be closed from the pop-up itself.