Firewall

If I only have the free Avast installed on my computer, do I need to turn off My Firewall? or leave it on. Since Avast has i’ts own Firewall i’m wondering if it wouldn’t cause conflict?

You have posted in the avast! Mobile Security forum, hopefully one of the moderators can move it to the correct forum.

Only the Avast Internet Security version has a firewall, the free version doesn’t have a firewall, so you need to have your firewall enabled.

avast! free does NOT have a firewall. It’s an antimalware only.
You need avast! Internet Security to get an antimalware + antispam + firewall…