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Internet Security software offers protection for computer users from viruses, spyware and malware from malicious sources on the Internet. While feature sets vary from product to product, some common security features include heuristic protection against "zero-day" threats, anti-phishing, anti-spam, root kit detection, a personal firewall, parental controls, identity protection or web content scanning.
Compared to Internet Security suites, Anti-Virus software offers only basic protection for users from malware. This software category offers fewer security features and generally has less impact on system performance. Some vendors also offer free Anti-Virus solutions that have fewer features than some commercial Anti-Virus products.
Total Security software offers all the protection against malware that Internet Security software would typically offer users, plus a range of PC maintenance tools, disk back up and other features that would help give users comprehensive coverage and safeguards against malware.