virus Last modified: Monday, June 25, 2007
A program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes. Viruses can also replicate themselves. All computer viruses are manmade. A simple virus that can make a copy of itself over and over again is relatively easy to produce. Even such a simple virus is dangerous because it will quickly use all available memory and bring the system to a halt. An even more dangerous type of virus is one capable of transmitting itself across networks and bypassing security systems. Since 1987, when a virus infected ARPANET, a large network used by the Defense Department and many universities, many antivirus programs have become available. These programs periodically check your computer system for the best-known types of viruses. Some people distinguish between general viruses and worms. A worm is a special type of virus that can replicate itself and use memory, but cannot attach itself to other programs. Also see The Difference Between a Virus, Worm and Trojan Horse  in the Did You Know? section of Webopedia.
•E-mail this definition to a colleague• Sponsored listings Fortinet Antivirus Firewalls and UTM Appliances on Sale - Fortinet Fortigate Antivirus Firewalls provide real-time network protection. Visit AVFirewalls.com for free Gifts with every Fortinet Purchase! Intel® vPro™ Technology - Protect your PC Fleet with Intel® vPro™ Hardware Based Technology! Comcast Business Class - Sign Up For Business Class & Save At Least 22% - Find Out More Now For internet.com pages about virus . Also check out the following links! Downloadable virus scanning software  Provides links to downloadable software for virus scanning. Included are VirusScan and TBAV for Windows, and F-PROT. eSecurity Planet  A resource for daily information on e-security targeted to IT managers. The site provides users with information from a variety of sources, including experts at security product and services firms, and the consultants who follow the security industry. McAfee virus information home page  McAfee Associates specializes in network and security management. This page displays company news and product information, as well as links to virus descriptions and online technical support. Open Networks Today  Networking news moves at a fast pace, and Open Networks Today lets you keep up with it. Open Networks Today offers its readers the ability to control how news is presented through customizing content filters, discussions, and news feed links. Symantec Antivirus Research Center  The Symantec Antivirus Research Center offers a wealth of information on viruses. It begins with a list of hot topics (new virus and virus products), and also provides links to virus alerts, an information database, references, submit virus samples, Macintosh viruses, and Symantec virus product information. The CERT/CC Home Page  Learn about the organizations mission and get up-to-date security information, security alerts and training information. Webopedia's "Did You Know... Preventative Maintenance Tips for Your PC"  The following tips will serve as a basic guideline to keep your PC maintained to run efficiently, increase component lifespan and also will help lessen the likelihood of PC failure. CIAC Virus Myth and Hoaxes Site Created as a public service by the Computer Incident Advisory Capability (CIAC) to educate people about virus myths and hoaxes. Computer Virus Myths Contains information about the newest hoaxes as well as background on computer viruses and myths, opinions and editorials, and recommended books and Web sites. Hartmann's In-The-Wild Macro Virus List Describes macro viruses reported by anti-virus software manufacturers. SecurityTracker.com Information on the latest security vulnerabilities, free SecurityTracker Alerts, and customized vulnerability notification services. Virus Info Database This is Symantec's Virus Info Database. You can search for a virus by name or refer to general virus information. Sponsored listings Network Security Software Directory - Compare network security software using Capterra's free, comprehensive directory. Northern NJ Same Day, Onsite Computer & Laptop Repair NJ - Offering same day on-site laptop & computer repair at your home or office. We provide fast, friendly, affordable & guaranteed computer services. Endpoint Protection 11.0 - Manage your endpoint security from 1 console. Get the trialware! Buy Juniper/Netscreen Firewall and VPN - We are a Juniper Elite Partner, offering the highest level of service and discount. IronPort Spam and Virus Blocker Appliances On Sale Now - IronPort protects networks against spyware & a wide variety of Web-based threats. Specializing in larger enterprise level companies.	Ethics Security Viruses antivirus program bootable diskette cellphone virus COLD Content Vectoring Protocol data recovery data vaulting dropper macro virus multipartite virus polymorphic virus sheepdip stealth virus Trojan horse virus signature Give Us Your Feedback Shopping virus Products Compare Products,Prices and Stores Shop by Category: Software 419 Store Offers Sport and Outdoor 46 Store Offers Health Aids 639 Store Offers Processors 61 Model Matches