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Antivirus software (sometimes spelled Anti-Virus or anti-virus with the hyphen) are computer programs that attempt to identify, neutralize or eliminate malicious software. The term "antivirus" is used because the earliest examples were designed exclusively to combat computer viruses; however most modern antivirus software is now designed to combat a wide range of threats, including worms, phishing attacks, rootkits, Trojans, often described collectively as malware.

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Wikipedia about anti virus

Antivirus software (sometimes spelled Anti-Virus or anti-virus with the hyphen) are computer programs that attempt to identify, neutralize or eliminate malicious software. The term "antivirus" is used because the earliest examples were designed exclusively to combat computer viruses; however most modern antivirus software is now designed to combat a wide range of threats, including worms, phishing attacks, rootkits, Trojans, often described collectively as malware.

Virus scanners

Antivirus scanning software, or a virus scanner, is a program which examines all files in specified locations, the contents of memory, the operating system, the registry, unexpected program behavior, and anywhere else relevant with the intention of identifying and removing any malware.

Typically two different approaches are used to identify malware, often in combination, although with an emphasis on the virus dictionary approach.

  • examining (scanning) files, etc., for known viruses matching signatures in a virus dictionary, and
  • identifying suspicious behavior from any computer program which might indicate infection. This approach is called heuristic analysis, and may include data captures, port monitoring and other methods.

Network firewalls prevent unknown programs and Internet processes from having access to the system protected; they are not antivirus systems as such, and make no attempt to identify or remove anything, but protect against infection, and limit the activity of any malicious software which is present by blocking incoming requests on certain TCP/IP ports.

Dictionary

In the virus dictionary approach, when the antivirus software looks at a file, it refers to a dictionary of known viruses that the authors of the antivirus software have identified. If a piece of code in the file matches any virus identified in the dictionary, then the antivirus software can take one of the following actions:

  1. attempt to repair the file by removing the virus itself from the file,
  2. quarantine the file (such that the file remains inaccessible to other programs and its virus can no longer spread), or
  3. delete the infected file.

To achieve consistent success in the medium and long term, the virus dictionary approach requires frequent (generally online) downloads of updated virus dictionary entries. Civically-minded and technically-inclined users, and those who want help find viruses not detected by the software, can send their infected files to the authors of antivirus software, who analyze them and include identifying features and removal information in their dictionaries.

Dictionary-based antivirus software typically examines files when the computer's operating system creates, opens, closes, or e-mails them. In this way it can detect a known virus immediately upon receipt. System administrators can schedule antivirus software to examine (scan) all files on the computer's hard disk on a regular basis.

Search results for Anti Virus

Antivirus & Content Security Software | Securing Your Web World - Trend ...

Official site of Trend Micro, a provider of antivirus and content security software and services.www.antivirus.com/

AVG Anti-Virus and Internet Security - Real-time protection against ...

Antivirus and internet security protection for home and business. ... AVG Anti-Virus Network Edition. Focus on your business and minimize IT resource requirements ...www.grisoft.com/ww.homepage

Symantec Home & Home Office Store

Official online store for all Norton and Symantec software.shop.symantecstore.com/store/symnahho/en_US/DisplayHomePage/...

Antivirus software - Wikipedia, the free encyclopedia

Anti-virus manuafacturers have been criticised for fear mongering by ... company Certus International Corp. then began to create anti-virus software programs. ...en.wikipedia.org/wiki/Anti-virus

Avast! Antivirus

Offers a free antivirus software package for home, noncommercial use. Protects against viruses, worms, and trojans on disk, CDs, in email, and during browsing.www.avast.com/

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News about Anti Virus

Staying Virus Free,' Vista' talks set at library

East Brunswick Sentinel"Windows Vista" and "Staying Virus Free" seminars are set for 7 p.m. on Sept. 11 and again at 1 p.m. Sept. 18 at the East Brunswick Public Library, Jean Walling Civic Center. Presenter Robin Kessler offer a program on the new Windows Vista system and on how to keep one's computer safe from viruses, spyware and malware (malicious software).http://ebs.gmnews.com/news/2008/0904/letters/023.html

Review: Bullguard Gamer's Edition security suite

Personal Computer WorldAn expanded version of the company’s Internet Security 8.0, Bullguard’s Gamer’s Edition includes the same core modules: Anti-virus, Anti-spyware, Firewall, Spam filter, Backup and Support. They’re a competent, well-integrated set of programs on a par with anything else on the market.http://www.pcw.co.uk/personal-computer-world/software/222540...

Lack of vaccines puts rabies control in Cagayan in limbo

GMA NewsTUGUEGARAO CITY, Philippines – This northernmost province is still wanting of anti-rabies vaccines as the number of cases involving the deadly virus continue to increase.http://www.gmanews.tv/story/118214/Lack-of-vaccines-puts-rab...

Kaspersky could increase anti-virus scan speeds

PC Advisor Security software vendor granted US patent US patent number 7392544 gives the security software developer the intellectual rights to a technique for varying scanning speeds dynamically according to a number of parameters such as file size, format, structure, whether it has been signed, and where the file might have come from. The overwhelming majority of files on a PC will be wholly ...http://rss.feedsportal.com/c/559/f/7174/s/1cc06df/l/0L0Spcad...

Cloudmark Warns That Companies Continue to Overlook Evolved Virus Attacks

Marketwire via Yahoo! Finance Cloudmark, Inc., the global leader in carrier-grade messaging security, today warns that service providers are placing e-mail users at risk by continuing to ignore sophisticated virus propagation techniques.http://biz.yahoo.com/iw/080903/0429926.html

News about Anti Virus

Seeing is Believing”: Anti-Virus’ Stellar Performance Creates a ...

PR.comClaremont, NC, October 09, 2008 --( PR.com )-- More than 80 million people across the world trust AVG Anti-Virus to protect their computers. One of them is Clyde Leslie of Miami, Florida. Leslie is like most people: He wants an effective security ... http://www.pr.com/press-release/109096

Firewall or UTM?

HULIQ.comSuch systems might integrate stateful packet firewalls with VPNs, zero day attack prevention, anti-spyware, gateway anti-virus, intrusion prevention, anti-spam, and URL filtering. The recent importance of green issues is another reason UTMs are ... http://www.huliq.com/1518/70628/firewall-or-utm

Cleartext offers MessageLabs clients incentives to switch

Itwire.comThe simplest offering is the bundling of three services for the price of two, for example including Content Control in the core anti-spam and anti-virus offering. The company is also offering discounts off the list price, as much as 20% for a single ... http://www.itwire.com/content/view/21160/1064/

ASUS ships Eee Box PCs with Malware

CNET AsiaI read about this on ZDnet and was totally NOT surprised because I ever surfed an ASUS website and my anti-virus warned me of a trojan on ASUS website itself. a year back! Well, obviously, I shouldn't name the company here for its reputation since it ... http://asia.cnet.com/blogs/geekonomics/post.htm?id=63006789&...

Norton Antivirus firm buys rival

BBC NewsUS anti-virus software firm Symantec has agreed to buy web security firm MessageLabs for $695m (£401.2m). Best known for its Norton range of PC security software, the move is set to allow Symantec to expand its internet services business. ... http://news.bbc.co.uk/1/hi/business/7660783.stm

Search results for Anti Virus

Antivirus Software - Scan for Computer Viruses - Microsoft Security

Help protect your computer against recent computer viruses by using antivirus software. Keep your operating system up-to-date with Windows Live OneCare & safety scanner to avoid ... http://www.microsoft.com/protect/computer/basics/antivirus.m...

Symantec - AntiVirus, Anti-Spyware, Endpoint Security, Backup, Storage ...

Norton AntiVirus, Internet security, and anti-spyware products for the home. Solutions to manage IT risk and maximize IT performance for business. Download free product trials of ... http://www.symantec.com/index.jsp

Free antivirus - Avira AntiVir

Download free antivirus protection - Avira AntiVir Personal official website. ... Question of the month. Be honest, do you think that the illegal data trade happens only ... http://www.free-av.com/

antivirus definition |Dictionary.com

Sponsored Links Norton Antivirus 2009 Stronger. Faster. Better than ever. Official US website. Download now! www.Norton.comhttp://dictionary.reference.com/search?q=antivirus

McAfee - Antivirus Software and Intrusion Prevention Solutions

McAfee, Inc, the leader in intrusion prevention and security risk management, proactively secures systems, and networks, worldwide.http://www.mcafee.com/
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Answers for Anti Virus

don't know me

What anti virus and firewall protection is better than norton anti virus and mozilla firefox?

don't know meNorton anti virus uninstall guidelines! http://forums.techguy.org/security/566663-norton-anti-virus-uninstall-guidelines.html Download and run the Norton Removal Tool http://service1.symantec.c...
Ladybug Kisses

Can an anti-virus set for automatic scans actually scan when your computer is turned off?

Ladybug KissesObviously not! It cant scan if the PC is turned off. But usually an anti virus (i am not quite sure about AVG though) does a missed scheduled scan once the PC is switched on. My suggestion would be t...
JAMES F

How do I get norton anti-virus off my computer and use Yahoo or microsoft instead?

JAMES FUse Symantec's tool from http://service1.symantec.com/Support/tsgeninfo.nsf/docid/2005033108162039 The uninstaller leaves stuff behind, but this should clear everything. Don't keep anything of t...
Workout_Joe

Is anti-virus software needed for cell phones running Windows Mobile?

Workout_JoeIt depends on how paranoid you are. :-) Currently, the malware for Windows Mobile is virtually non-existent. There is one stupid virus which asks for permission before replicating, and a couple of ...
Rose

How can I stop an Anti Virus site which blocks and saying that my computer don't have the security?

RoseIt's not normal. I have avast! installed. avast! should not be causing the problems you're having.

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