AVG FreeRapid virus database updates for the lifetime of the product
Easy of use
No system slow down
Automatic update functionality
The AVG Resident Shield, which provides real-time protection as files are opened and programs are run
The AVG E-mail Scanner, which protects your e-mail
The AVG On-Demand Scanner, which allows you to perform scheduled and manual tests
The AVG Virus Vault for safe isolation and handling of infected files
And most of all ... great customer satisfaction
You should also have a Firewall & Antispyware installed.