Firefox loads up fine but after a short time won't load up websites anymore (server not found).

If i shutdown za websites normal internet surfing resumes until I restart za. Re-booting my pc allows me to have a short time of normal internet surfing.

The same happens with Internet Explorer

My Specs follow...

Windows XP
Zonealarm free (latest)

I have to shutdown za to post this topic.

Operating System:Windows XP Pro
Product Name:ZoneAlarm (Free)
Software Version: