Windows Action Center has started complaining that my spyware and antivirus protection is turned off. I can turn on Windows Defender, but not Avast. If I open Avast it says the system is Secure...everything up to date...all shields active. This problem started after Avast downloaded the 8.0.1488 update. I've tried uninstalling Avast, downloading the 8.0.1488 installer and reinstalling. I tried it 3 or 4 times now. This is on a new Acer laptop running Windows 8 64 bit.