avast+zonealarm

avast and zonealarm pro work good together?

and why when i install zonealarm its say me i need stop webshiled avast?

They work together, but you need to do some adjustments…

If you are using ZoneAlarm Pro and Privacy Control in ZoneAlarm is set to High and if you click YES in avast compatibility dialog box the transparent mode proxy in webshield will be turned off you have to manually configure browser to access Internet. To manually configure your browser watch instructional video. In this case, the value ZoneAlarmCompatibility=1 should be at avast4.ini file.

More info: http://forum.avast.com/index.php?topic=1647.msg15960#msg15960