Avast Virus...

avast! Professional Edition - antivirus for Microsoft Windows


avast! Professional Edition is a collection of award winning, high-end technologies that work in perfect synergy, having one common goal: to protect your system and valuable data against computer viruses. It represents a best-in-class solution for any Windows-based workstation.

This page demonstrates its most important features and provides links to further resources.

The latest version of avast! antivirus kernel features outstanding detection abilities, together with high performance. You can expect 100% detection of In-the-Wild viruses (viruses already spreading between users) and excellent detection of Trojan horses.



The kernel is certified by ICSA Labs; it frequently takes part in the tests of Virus Bulletin magazine, often yielding the VB100 award.

The avast! engine also features outstanding unpacking support. It can scan inside the following archives: ARJ, ZIP, MIME (+ all associated formats), MAPI (Outlook pst files), DBX (Outlook Express archives), RAR, TAR, GZIP, CAB, BZIP2, ZOO, ACE, ARC, LHA/LHX, TNEF (winmail.dat), CPIO, CHM, RPM, ISO, 7ZIP and SIS. It also supports a number of executable packers (such as PKLite, Diet, UPX, ASPack, PeShield, FSG, MEW etc.).

Last, but not least, it can also scan for viruses hidden in Alternate data streams on NTFS volumes.

The Simple User Interface is used to start on-demand scanning, work with the results and change various options. Basic resident protection settings can be modified here.

The Simple User Interface is the main application of avast! Home Edition. You can start additional avast! modules from here, such as the Virus Chest, Updater or Log Viewer.

The appearance of the Simple User Interface is very flexible. It supports so-called skins (changeable appearance of the application), so you can change the interface to suit you. The main package contains three skins, with additional skins available from our web pages.

In addition to the Simple User Interface, the Professional Edition presents the Enhanced User Interface, giving you access to all features and possibilities for extensive scanning control.

Unlike the Simple User Interface, the scanning is performed by so-called "tasks". First, you define a task, including various parameters - areas to scan, what to scan, how to scan, etc. Having the task, you can run it (possibly repeatedly). Each task generates a list of results, which you can work with later.

Another key feature, closely connected with tasks, is the Scheduler. This feature gives you the ability to schedule the tasks running, either one-time or periodically.

Additionally, it is possible to set all existing scanning options, a feature not available in the Simple User Interface.

AntiVirus

Antivirus software consists of computer programs that attempt to identify, thwart and eliminate computer viruses and other malicious software (malware).

Antivirus software typically uses two different techniques to accomplish this:

a) Examining (scanning) files to look for known viruses matching definitions in a virus dictionary

b) Identifying suspicious behavior from any computer program which might indicate infection. Such analysis may include data captures, port monitoring and other methods.

Most commercial antivirus software uses both of these approaches, with an emphasis on the virus dictionary approach.

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) delete the infected file

2) attempt to repair the file by removing the virus itself from the file

3) quarantine the file (such that the file remains inaccessible to other programs and its virus can no longer spread)

To achieve consistent success in the medium and long term, the virus dictionary approach requires periodic (generally online) downloads of updated virus dictionary entries. As civically minded and technically inclined users identify new viruses "in the wild", they can send their infected files to the authors of antivirus software, who then include information about the new viruses 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. Note too that a System Administrator can typically schedule the antivirus software to examine (scan) all files on the computer's hard disk on a regular basis.

Although the dictionary approach can effectively contain virus outbreaks in the right circumstances, virus authors have tried to stay a step ahead of such software by writing "oligomorphic", "polymorphic" and more recently "metamorphic" viruses, which encrypt parts of themselves or otherwise modify themselves as a method of disguise, so as to not match the virus's signature in the dictionary. [Wikipedia]

There are various type of antivirus available in market like Avast, AVG, Etrust, Kaspersky, McAfee, NOD 32, Panda, Norton, PC Cillin etc

AntiVirus Installation (Symantec AntiVirus)

Anti Virus...
What is an AntiVirus software?
There are a lot of definition regarding AntiVirus...

- Antivirus software is a class of program that searches your hard drive and floppy disks for any known or potential viruses. ...
- A software program which helps protect a computer against being infected by a virus.
- Software that scans your computer's hard drive for all known traces of viruses. After the scanning is complete you can usually choose which viruses to delete. ...
- Antivirus software is a type of application you install to protect your system from viruses, worms and other malicious code. ...

And what is computer Virus?

There are also a lot of definition from different people...

- A computer virus is a piece of code that is secretly introduced into a system in order to corrupt it or destroy data. ...
- A dangerous computer program with the characteristic feature of being able to generate copies of itself, and thereby spread throughout the computer system. Additionally, most computer viruses have a destructive payload that is activated under certain conditions.
- A potentially damaging computer programme that affects or infects a computer negatively by altering the way the computer works, without the user's knowledge or permission
- A software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer
- A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. The original may modify the copies or the copies may modify themselves, as occurs in a metamorphic virus. ...

etc.....

How to protect our computer from all these viruses?

It simples...Just install an AntiVirus program..

There are a lot of AntiVirus programs in the market...

For Example :
Panda,NOD32,Norton,Symantec,Avast,AVG,McAfee,Kaspersky etc....

In this section I would like to talk about installing Symantec AntiVirus...
First of course you need the setup file...
So double click the setup file...
The setup will prepare to Install...



Press Next...

Select "I accept the terms in the License agreement" then press next...


Choose the Client Option and press Next


Complete setup type is recommended..


Then, choose Unmanaged is your computer is not managed by Symantec AntiVirus Server Edition..


Then tick Auto-protect and Run LiveUpdate


Press Install to start your installation...



Press finish...

There are 2 way to update your Virus Definition...

1)

Click the small icon at the bottom right beside your clock

Then choose LiveUpdate...


Press Next to start...



Your program will connect to server...


Then it will automatically download the most suitable Virus Definition for you...


After that i click Finish to end...

2)

The second way is you need to log in to this website:

http://www.symantec.com/avcenter/download/pages/US-N95.html



See the virus definition above...download it...


Install the virus definition...


Run the file...


Press Yes to update your Virus Definition files...



It will start to install and finish...

The End

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