- Viruses - A virus is a small piece of software that piggybacks on real programs. For example, a virus might attach itself to a program such as a spreadsheet program. Each time the spreadsheet program runs, the virus runs, too, and it has the chance to reproduce (by attaching to other programs) or wreak havoc.
- E-mail viruses - An e-mail virus moves around in e-mail messages , and usually replicates itself by automatically mailing itself to dozens of people in the victim's e-mail address book.
- Worms - A worm is a small piece of software that uses computer networks and security holes to replicate itself. A copy of the worm scans the network for another machine that has a specific security hole. It copies itself to the new machine using the security hole, and then starts replicating from there, as well.
- Trojan horses - A Trojan horse is simply a computer program. The program claims to do one thing (it may claim to be a game) but instead does damage when you run it (it may erase your hard disk ). Trojan horses have no way to replicate automatically.
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McAfee offers antivirus and computer security software for home PCs or corporate computer networks. Find out about current products, learn about web and e-mail protection for home or business users, or get technical support.
Provider of centrally managed security products for the mobile enterprise. Formerly known as Data Fellows.
Supplier of enterprise-wide network security and management software.
Anti-virus and data security software, produces anti-virus sol'ns for these systems: MSDOS, Windows, Windows NT, NetWare, OS/2 and VMS as well as encryption software
Makers of antivirus and security software products for networks and desktop computers.
Official site of Tren Micro, a provider of antivirus and content security software and services.
Makers of anti-virus products, including software and scanners.
Specializing in anti-virus products, including F-Prot, and virus research.
Develops software for e-mail security and management, content checking, anti-virus, intrusion detection, and fax servers.
Computer anti-virus products.