Overall score is based primarily on detection, plus the other test results. Detection is how well the product detects new viruses without falsely identifying benign files as viruses. Features indicates how many useful features are included. Ease of use indicates how easy the product is to use. Speed is how quickly the product scans a typical hard drive. Scheduled scan means you can set up automatic scans. IM scan shows whether the product scans instant messages. Firewall indicates whether there are features to block hackers. Also in suite means that the same, or similar, software is available in the manufacturer’s security software suite. Price is for the retail, boxed version; downloads are usually available. Annual fee is for protection after the first year.