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June 11, 2011

Computer Viruses And How to Block Them

Everyone who has been on line for more than a few weeks has heard of computer viruses. Many surfers have had them and loads of people have them and do not know it. Not all computer viruses are intended to do damage to the infected computer. Some viruses are meant to steal valuable data such as account numbers and passwords and other viruses are meant to record where you go and what you are interested in.

This information, once garnered, is sent back to the virus’ master who will use it to either steal from you or spam you to death with deals based on the words that you have typed into your keyboard. These viruses are also known as tracking cookies. There are also Trojans (Trojan horse), worms and bombs.

There are firms that provide )free of charge) or sell anti-virus software which is intended to protect your computer from these computer viruses. However, because up to several dozen of these viruses are released on a daily basis, you have to have the virus database of your anti-virus software up-dated on a daily basis too. The anti-virus (AV) software virus database is full of all the virus patterns available so far.

It has been estimated that 80% of viruses are intended to destroy data on the computers they infect. That is, they will destroy the file allocation table of your hard disk drive making it unreadable, but different viruses do different things. I had a virus in December that wiped out my Outlook address book. Two weeks later as I was refilling the address book, and it cleaned it out again.

There are a few jobs you can do to minimize your danger of picking up computer viruses. The first thing you have to do is install an AV programme and adjust its settings. Some of the free AV software is as powerful as some of the purchased AV software, but if you want the best, you will have to buy it. It is not costly – less than $50 a year – especially when you compare it with the cost of repairing a damaged computer.

Once you have selected and installed your AV software, check the options and instruct it to check all incoming and out-going files – that is downloads, uploads and emails. If it will not check emails, it is no good, get another one. Then instruct it to update the pattern files (database) automatically or daily.

Update your patterns and then perform a complete system scan – it can take hours. Then, set the AV software to scan your computer once a week at some time when it will be on, but not in use. I do mine at 2 AM on Monday.

Be wary. Be as suspicious of downloading as you are of strangers prowling around at dusk. Never download from porn sites. Be wary of small files. Most viruses, like their living counterparts are tiny. Therefore if you would like to download a film or some music and it is much shorter that usual, be careful or do not do it. Be suspicious of attachments to emails from people you do not know.

Acquire anti-spyware software and run it regularly or / and set your browser to dump all cookies at the end of a session (clearing out privacy). If you regularly run into difficulties after dumping the cookies of a site you go to often (like Google), then add them to your ‘Trusted Zone’. Computer viruses are out there and can have costly consequences, but you do not have to get them, if you take a couple of (free) precautions.

Owen Jones, the writer of this article, writes on several topics, but is now involved with the wireless broadband router. If you want to know more, please visit our web site at Best Router For Gaming Online

February 8, 2010

The Best In The Antivirus Industry

Most computer users in the United States have heard of the leading American antivirus vendors. Manufacturers such as Symantec, McAfee, Computer Associates, and Trend Micro. These companies have a market leading presence in the United States. Microsoft, too, has aspirations to become a key player in this enormous growth market.

In fact, Microsoft bought intellectual property and technology rights from GeCad software in 2003, a company situated in Bucharest, Romania. They also acquired Pelican Software, which had a behaviour orientated security product, as well as the Giant Company Software for spyware and Sybari Software, which managed virus, spam, and phishing filtering.

A great deal of debate centered on whether Microsoft would end up in a domineering position in the antivirus market by simply bundling its newly acquired software technologies up with its Windows operating systems at no cost. This is a comparable technique that has been used in other markets such as word processing and Internet browsers. In fact, this is precisely what did take place. Microsoft has come out with a free product called Microsoft Security Essentials.

It is too early for me to tell whether MS Security Essentials is a world-class antivirus product, but it is not free to everyone. Microsoft has been struggling with Windows piracy for a while now with its Windows Genuine Advantage sneaky download and sure enough, this new product from Microsoft will only work on Windows systems and even then, only with operating systems that pass the Windows Genuine Advantage check. (Please click the link at the bottom the page to find out more).

There is nothing wrong with that per se, but it does mean that hardly anyone in the Third World will be able to make use of it, because a pirated operating system comes bundled with every computer that I have ever seen in Asia and probably elsewhere too. People save for years in order to afford a computer and the last thing they worry about when they plug it in is whether the operating system is genuine or not.

Of course there is a number of other antivirus manufacturers prominent in this market. There are many companies with great market presence in other countries that are beginning to become more widely recognized. These vendors include GriSoft from the Czech Republic, Sophos from the United Kingdom, Panda Software from Spain, Kaspersky from Russia, SoftWin from Romania, F-Secure from Finland, Norman from Norway, Arcabit from Poland, VirusBuster from Hungary, Nod from Thailand and AhnLab from South Korea.

It is not yet apparent where the industry is heading and everyone in this market faces a swiftly changing scenario. The amount of effort required to discover and deliver updates for new viruses is quite astonishing. Malicious programs are becoming more and more complicated and the quantity of them is increasing.

Many companies may find themselves without the capital to equal the hard work of those truly determined to create chaos. The antivirus companies are receiving hundreds of new examples of viruses a day! What is more, the new viruses are getting “cleverer” in that they spread themselves quickly and they often hide themselves too. Some are even intelligent enough to move around in a system by renaming themselves in an effort to make it hard to remove them.

Owen Jones, the author of this article, writes on many subjects, but is currently involved with researching the Microsoft antivirus software. If you have an interest in such software, please go over to our website now at Computer Antivirus Software

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January 10, 2010

Computer Virus Examples

New computer viruses are being created, exposed and fought every day. These computer viruses are created often just to annoy us and to wreak mayhem in our computer systems. Below, I have described ten viruses currently cited as being the most widespread and being potentially able to cause the most damage. However, new viruses are being created daily, so this list is by no means complete. The only thing you can do is stay alert, keep your anti-virus software updated, and stay aware of the current computer virus threats.

Virus: Trojan.Lodear: A Trojan (from Trojan Horse) that attempts to download files from a remote source. It will inject a .dll file into the EXPLORER.EXE process causing system instability.

Virus: W32.Beagle.CO@mm: A mass-mailing worm that lowers security settings. It can delete security-related registry sub keys and may prevent admittance to security-related websites.

Virus: Backdoor.Zagaban: A Trojan that allows the infected computer to be operated as a covert proxy and which may degrade network performance.

Virus: W32/Netsky-P: A mass-mailing worm which spreads by emailing itself to addresses harvested from files on the local drives.

Virus: W32/Mytob-GH: A mass-mailing worm and IRC backdoor Trojan for the Windows platform. Messages sent by this worm will have the subject chosen randomly from a list including titles such as: Notice of account limitation, Email Account Suspension, Security measures, Members Support, Important Notification.

Virus: W32/Mytob-EX: A mass-mailing worm and IRC backdoor Trojan similar in nature to W32-Mytob-GH. W32/Mytob- EX runs continuously in the background, providing a backdoor server which allows a remote hacker to gain access and control over your computer via IRC channels. This virus propagates by sending itself to email attachments harvested from your email address book.

Virus: W32/Mytob-AS, Mytob-BE, Mytob-C, and Mytob-ER: This family of worm variations possesses similar characteristics in terms of what they are able to do. They are mass-mailing worms with backdoor functionality that can be controlled through the Internet Relay Chat (IRC) network. Furthermore, they can propagate themselves through email and through various operating system vulnerabilities such as the LSASS (MS04-011).

Virus: Zafi-D: A mass-mailing worm and a peer-to-peer worm which replicates itself to the Windows system folder with the filename Norton Update.exe. It can then generate a number of files in the Windows system folder with filenames made up of 8 random characters and a DLL extension. W32/Zafi-D replicates itself to folders with names containing words like ‘share’, ‘upload’, or ‘music’ as ‘ICQ 2005a new!.exe’ or ‘winamp 5.7 new!.exe’. W32/Zafi-D will also show a fake error message box with the caption “CRC: 04F6Bh” and the text “Error in packed file!”.

Virus: W32/Netsky-D: A mass-mailing worm with IRC backdoor functionality which can also infect computers vulnerable to the LSASS (MS04-011) exploit.

Virus: W32/Zafi-B: A peer-to-peer (P2P) and email worm that will reproduce itself to the Windows system folder as a randomly named EXE file. This worm will check for the presence of an Internet connection by attempting to connect to google.com or microsoft.com. A bilingual, worm with an attached Hungarian political text message box which translates to ?We demand that the government accommodates the homeless, tightens up the penal code and VOTES FOR THE DEATH PENALTY to cut down the increasing crime. Jun. 2004, P?cs (SNAF Team)?

Owen Jones, the author of this article, writes on many subjects, but is currently involved with the network antivirus software. If you have an interest in such software, please go over to our website now at Computer Antivirus Software

Spyware, Adware and Antivirus

Adware, spyware and anti-virus software share some similarities, one of which is that all three are major problems for computer users. Let’s make a distinction between the three.

Spyware is software that does not necessarily harm your computer. What it does is build links whereby someone else apart from the computer owner can communicate from that computer. Normally spyware records the different kinds of web sites you go to and sends that information to web advertisers, who then later send you unwanted emails and pop-ups.

Which is why spyware is disliked and avoided. It is more invasive than adware. Spyware has its own separate executable programs, which allow it to record your keystrokes, scan files on your hard disks and look at other applications that you use, including but not limited to chat programs, cookies and Web browser settings.

Spyware then sends the data that it had gathered to the spyware author. The author will then use this data for advertising and marketing purposes. They also sell the information to advertisers and other parties.

Adware, on the other hand, is a more legitimate sort of software.. It is similar to spyware but adware is advertising spyware which is packaged into free software or a free program and is installed automatically once that particular program or software is loaded into your computer system.

Some types of adware, on the other hand, download advertising content when a particular application is being run. Some adware acts like spyware in that it tracks and reports user information to the program’s authors.

The signs of spyware infection include pop-up ads that seem to be unrelated to the site you are looking at. Sometimes spyware pop-ups are advertisements about adult contents. Furthermore, if you become aware of your computer slowing down, there is a big chance that spyware and its components have found their way into your operating system. If Windows desktop takes a long time to load, it is best to scan your computer for spyware infections.

Viruses, on the other hand, are a destructive type of software. They were designed and created for one purpose alone and that is to inflict havoc on your computer. They may destroy whatever data they come in contact with, can instigate self replication and then infect as many components of the computer’s operating system or network as possible.

These days, a lot of anti-virus software also offers spyware and adware scanning and removal utilities. They then remove it as well as its components located in the system registry and other places on your computer. It is therefore, good practice to regularly update your anti-virus and anti-spyware scanner to ensure that your computer is protected from the thousands of spyware and viruses in the Internet. Beware of free add-ons or free anything really.

Adware could be spyware in disguise and could be just waiting to be deployed for its writers to gather your data. Learn how to set up a firewall and pop-up blocker in order to minimize the risk of computer infection and guarantee the security of all your computer files.

Owen Jones, the author of this article, writes on many subjects, but is currently involved with researching the best virus protection software. If you have an interest in such software, please go over to our website now at Computer Antivirus Software

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