I have Avast Internet Security 19.2.2364 (build 19.2.4186.404), today it updated and old SecureLine disappeared.
I tried installing it from Avast IS but it just spins for a long time, no install.
Then installed using avast_secureline_setup.exe, or using Licenses page (Activate and install), both times it said it finished (version 5.1.419), restarted the PC (Win 10 1809) after each change but the VPN service can't start: "Sorry, Avast SecureLine Service is not responding".
Restart the service button doesn't work, there's no vpn.exe in the c:\Program Files\Avast\ folder (it was installed in c:\Program Files\AVAST Software\SecureLine\, but seems Avast can't see that and I can't install in /Avast/, it doesn't let me).
Also tried resetting Avast IS settings, pressing Repair, starting the service in Services manually. No event in Event Viewer.
Support file: 5T09Q