I've been receiving Action Center warnings ever since update 1489, never had this issue ever before.
I've tried all the suggestions written here in the forums about uninstalling and re-installing Internet Security, including one suggestion to use the Avast uninstall tool to uninstall in safe mode! This has lead me to the conclusion that the issue is with the update and my Windows 8 64 bit OS.
Avast says everything is fine but Windows 8 says its not so what I want to know is whether I'm actually still protected or not?
I absolutely refuse to clean install my Windows 8 OS, that is an unacceptable "solution" to a third party software update.