Anti-virus
Anti-virus software scans a computer to find malware and then attempts to remove the possible threats posed by that malware. It uses a library of "Signatures" to do this, which are used to search for malicious patterns within the operating system's code and are only updated as viruses are created.
At 鶹Ƶ, we use Symantec Endpoint Protection, which is a product released by Norton Anti-virus.