BitDefender is the best antivirus software for both the money and easy of use. BitDefender is rated as No.1 on most antivirus review websites .Good thing about BitDefender is that it protects your computer and files, as well as is easy to use, its also very light on your computer and, least costly antivirus also.
No matter how efficient a software may be, it is used widely only if it is easy to use. This is very true with antivirus softwares. Many people fail to protect their computers from threats because of 'burden' of installing and maintaining a antivirus software. The best protection is worthless if people find it complex and discouraging to use.Bidefender does not require you to have a good IT knoeledge thus is favoured among wide range of people.
Moreover BitDefender provides comprehensive protection, takes up little space , costs less and very requires little maintenance.
BitDefender Features
* Effective antivirus protection
* Light weight application
* Value for money 
Softwin's BitDefender Professional provides protection against the viruses, trojans ,spywares, and also offers a decent firewall to block undesirable traffic .It has a privacy gateway to keep your identity and preferences private and safe while you surf the Internet.
BitDefender antivirus is developed by Bucharest-based software company named SOFTWIN. It launched BitDefender in November 2001, and currently released its tenth version. BitDefender has replaced SOFTWIN's earlier product AntiVirus eXpress . The BitDefender provides antivirus for home users, businesses, enterprises and Internet service providers. Home edition of BitDefender supports Microsoft Windows (both XP and Vista), Symbian OS and Windows Mobile;and enterprise editions support Microsoft Windows, Linux and FreeBSD. The current version of BitDefender includes antivirus,firewall , anti-spyware, e-mail spam filtering and parental controls. A free basic online scan is also avaliable at the BitDefender website.
BitDefender has very good reviews in the market ,and the home version of this security suite was given the PC Answers editor's choice award in May 2007 comparative review . By the end of June 2007, BitDefender passed Virus Bulletin's VB100 independent tests 14 times out of 18 since its first test in 2002. BitDefender also has achieved an advanced certification from AV Comparatives for on-demand scanning, and also a standard level certification for catching unknown viruses, the only critisim it got for its slower scanning speed and higher instances of false positives. According to TopTenReviews BitDefender is considered the number one antivirus software and internet security software . It also the least expensive one out of the top three antiviruses as ranked by PC World.
The Older versions of BitDefender Antivirus can be downloded for free whenever a new version is released. This has started since its first version was made freely available ie; version 8. By the end of November 2007, version 10 of BitDefender was freely available for download. The free version unlike the commercial versions only offers an on-demand virus scan, and does not provide a real time scan, and therefore is not veryu suitable for computers that have continuous internet connection.
A worm is a program that is self-replicating . It replicates itself using a network and sends copies of itself to other computers and it can do this without any user intervention. Unlike virus, it does not require to attach itself to an existing program. Worms almost always networks by giving un necessary traffic and such out lot of bandwidth .
In term computer virus was coined by , Fred Cohen in 1983 due to its ability to infect other programs like a normal virus . A year later Cohen released an official paper on virus in which he further described a virus as a that has the ability to make another program as a virus that can further infect other files .
There are certain types of files that are vulnerable to a virus .These are the files that can be executed and also some macro files like Microsoft word document fall into such category
Documents file formats like JPG, Adobe PDF's and other image formats cannot be used as a virus but can be affected by a virus though and get damaged .
A virus is spread through removable things like CD's ,Floppies ,USB Drives or can easily spread through internet ,Local area network in the form of files ,email attachments etc.
A computer virus is set of computer instructions that is written by somebody to intend damage. This instruction or tells the computer to perform some destructive tasks like deleting files infecting other files by replicating same code in those files or it can even get worse by crashing an Hard Disk. Some viruses have been known to do nothing more than put a smiley face or display some message on screen.But in all cases a virus is undesirable and needs to be checked by a good and updates Antivurs
Antivirus as the name suggests is anti virus in nature .Its basically a program that to identify, neutralize ,delete a virus,worm,Trojan, malware. Antivirus aims at keeping your computer safe and protected from malicious programs that intend to harm your computer and its applications.
An antivirus application works in two ways. One is to scan all the files according to user preference, and identify the malicious activity caused by a virus . Virus identification is done by matching symptoms with its database of known viruses. Another way a Antivirus identifies a virus is during run time , ie;it continuously monitors and tries to identify the malicious activities occurring in the system. If it founds one then it tries to match the symptoms with its database.If a match is found then a virus message is displayed to the user prompting him to let the Antivirus Delete that virus or put it in quarantine .
