I have just been told popup that Avast is not working. It turns out on looking more closely that it is the firewall that is not working. I know this. I use the Free version and have installed another firewall. I was alarmed to see the alert for a few seconds before realising that there was nothing wrong. I could have panicked and clicked the button to enable and so BUY the Avast firewall.
I don’t mind Avast drawing my attention to paid for products but this is the sort of tactic you expect from crooks and it creates a very bad impression. It also tends to legitimise popups from crooks who are trying to get users to install their malware through this type of approach.