Hi
I have just installed Avast Internet Security and there is a warning about Firewall not being on. when i try to turn it on, it says “Firewall nort available” and when i go to Application rules Avast crushes.
Can anyone help?
Regards
You can repair AIS with repair function( Control Panel-Add/Remove Programs-Avast Antivrus-Repair-Restart your computer) or you can remove AIS with aswclear tool and try latest version of AIS 6.0.1279 BETA 
aswclear: http://www.avast.com/uninstall-utility
AIS 6.0.1279 BETA: http://files.avast.com/files/beta/6.0.1279/setup_ais.exe