Always use antivirus software and keep it up-to-date. Antivirus software recognizes malware and protects your computer against it. Installing antivirus software from a reputable vendor, like Total Defense, is an important step in preventing and detecting infections. Always visit vendor sites directly rather than clicking on advertisements or email links. Because attackers are continually creating new viruses and other forms of malicious code, it is important to keep your antivirus software up-to-date.