Avast version is free 18.6.2349, build 18.5.3931.0, AV defs is 180901-4. Windows is 64bit Windows 10 Pro, 1803. (17134.228). This is my computer.
Ex uses a Windows 7 machine, and have the same version of Avast and defs, Our son also for the moment is still on Windows 7.
And I have the wonderful Windows Defender in my computer whether I like it or not. At least it has the courtesy of being quiet with other AV products running.
I have used several other AVs in the past (Symantec, Panda, Mcafee and so on), but my computer, I reinstalled from scratch in July. (Harddrives passing best before date).
This occurred about the same time the Avast 18.5.3931.0 was released for all three of us. I can't check our other sons computer because (even if I easily can bypass it) don't have his password. Our daughter uses Avira.