Think that need to look around and buy some other antivirus program. During this year I had a few attacks. Avast never recognized them and never blocked them and never found them during the scannig. I need to reinstall Windows. I never received any warnings from Avast when specially try to go go to some dangerous web pages to check how this antivirus works.
Now I made a research in internet about antivirus programs, read reviews about many other programs and found that Avast is not the best.
Time to switch.