allow file sharing between two computers

I want to know how to configure Avast to allow file sharing between two computers connected to the same hard wired router. Both computers have Avast free installed and running. One uses XP Home, the other XP Pro. The internet connection is on the other side of the router. Thanks for any help.

I don’t think that Avast Free would interfere with file sharing. See http://support.microsoft.com/kb/304040 for instructions on simple file sharing.