ZoneAlarm is a Windows utility that lets you filter web traffic and stop potentially dangerous software from infecting the computer. Additionally, there are tools for preventing personal data interception and detecting spyware. You are able to add any website to the list of blocked domains.

Protection

After installing the application users can run it in the background to track network connections created by third-party software products and system processes. Potentially dangerous activity is blocked automatically to protect the system from hacker attacks.

Another helpful feature is detecting rootkits. Moreover, this program checks opened web pages and notifies you in case of a phishing attack to prevent private data leaks.

Custom rules

Like in Sygate Personal Firewall, users can manually add any installed app to the blacklist for blocking outgoing network connections. It is possible to edit existing rules in the corresponding section.

Antivirus

There are security instruments for preventing external virus and trojan attacks on the system. Intrusive advertisement pop-up windows can be blocked as well. You are able to scan any file on the hard drive to locate infected items.

Features

free to download and use;
lets you block unwanted and dangerous internet connections;
there is an antivirus module for preventing external attacks;
all traffic can be monitored and filtered;
compatible with modern versions of Windows.