Today AVG disappeared from my PC

Today AVG disappeared from my PC. Like someone uninstalled it.

Furthermore, Windows firewall has taken over and an AVG entry with no icon in Programs & Features shows an error when I click on it, that the program is already uninstalled.

I downloaded AVG again, I installed it and it did the second time, because initially it had some issues I cannot remember. Also now that it seems installed, "IDP.Generic.ad77e8563e4c.3.2" found winlogui.exe in system folder.

Why did this thing happened ?