I have Windows 10 Home 64 bit. The default choice for the Security, in Home edition, is to turn off Windows functions when a third party AV is installed and enabled. It is a more difficult proposition in Windows 10 Professional, as it has ‘advanced’ security applications installation (Bit Locker, etc…). But I remember it suggested to me, a number of years back, to not use two software firewalls. In this forum. Because conflicts between the two can be resolved by the operating system picking Avast and ‘protecting’ it in Windows Firewall. It does do that!