Anti-Virus
Antivirus detects viruses, worms and Trojans as well as executable files or Windows DLL libraries that could be potentially unwanted within your Windows Vista or Windows XP system. Antivirus also holds the internal virus database, and therefore it keeps the maximum level of protection when regularly updated.

Anti-Spyware
Antispyware protects tour computer from all kinds of malware (malicious software), e.g. spyware that secretly gathers information and privacy data from your computer, or adware that generates unwanted advertisement on your computer.

Anti-Rootkit
Antirootkit scans for dangerous rootkits hidden inside applications, drivers and Windows DLL libraries. A rootkit is usually a collection of malicious software that allows attacker to gain administrator-level rights and access to a computer or possibly whole network in your home or office. Rootkits are generally very well hidden in an operating system which makes them hard to detect or remove by regular security tools.

Web Shield & LinkScanner
Web Shield-This component protects you against accidentally downloading infected files or exchanging infected files over instant messaging.

LinkScanner-LinkScaner works with Internet Explorer and Firefox, and consists of two features. AVG Active Surf-Shield and AVG Search-Shield.

Firewall
Firewall defines rules that protect your computer from outside attacks, typically from the Internet, and control (allow/forbid) all communication on every network port. If Firewall recognizes and intrusion attempt, it blocks immediately and does not let the intruder access to your PC with Windows.