I have Earthlink Cable Broadband, after calling them they told me many people calling, problem is with ZoneAlarm.
They suggested using Symantec or other, tried to sell me subscription.
My solution for now:
Enable Windows Firewall (Control Panel\Windows Firewall).
Disable ZoneAlarm Firewall (Zonealarm Firewall, drag both sliders to OFF).
Operating System:Windows XP Home Edition
Software Version:7.1 (Vista)
Product Name:ZoneAlarm Internet Security Suite