I hear sound glitches using streaming audio from the internet. When I shut-down Zonealarm Free, the problem has gone.
I use the latest software versions of ZoneAlarm, Internet Explorer, Firefox and the plugins: Windows Media Player, Flash player and Shockwave player. With all these combinations the sound glichtes can be heard but mostly using the Media Player.
A relationship exists: each time data is received the sound glitches can be heard; no data, no sound glitches.
My computer is not suffering from lack of memory or processing power.
Asus P6t Deluxe motherboard.
On board sound with Soundmax drivers
6 GB DDR3 memory
I could use Windows Firewall (no problems), but I prefer ZoneAlarm mostly because its feature of indicating outgoing requests.