(Pay attention to the version avast7 network security file (antivirus firewall protection network), first try the antivirus and then maintain - insert the license file, unzip it. avast free persistent antivirus
Avast!7 License\Net_20121021_License.avastlic
Avast!7 License\Net_20121217_License.avastlic
Avast!7 License\Net_20130107_License.avastlic
Avast!7 License\Net_20130108_License.avastlic
Avast!7 License\Net_20130305_License.avastlic)