After the update to 2014.9.0.2018 I too have problems with the paid version (it may even be happening with the free version, I dunno).
My problem is in the action center, Windows is reporting that both Virus Protection, and Spyware are off. (see
http://imgur.com/T2O5cB6.jpg )
Then, when I mouse over Avast Internet Security in the task bar, I get a 'Everything is good' message. (see
http://imgur.com/JqFIScS.jpg )
This has happened before with the previous update, and it fixed itself after I subscribed. I am not running any other AV programs.
Windows 8.1 Update 1 x64
16GB Ram
Um dunno what else you guys would need to know, if theres anything, just ask.
Would like to get this sorted as its happened a few times now, Always quite annoying.