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V
irus, spyware, adware, malware and trojan removal


You may be unlucky enough to see this - or similar - messages. Whatever you do, don't download the software it, or they recommend. The message is most likley put there by the very people trying to cure the infection. Hardly an honest practice.


Viruses. Many, if not most of us have at some time had the misfortune of having one or more computers infected by a virus, worm or trojan. There are subtle differences between these three and below is a brief explanation of each of them. E-Systems can remove alll known viruses from your computer systrem/s and almost always get your computer running again. After any severe infection, it is always advisable to completely erase the hard disk and start again. Sometimes this is not possible and so, what we call 'the sticking plaster approach' is favoured. Whilst this method usually gets the computer up and running as normal, it is not a guaranteed remedy to all of the problems the virus/es may have caused. Problems can be very deep rooted and may not manifest themselves until a certain program or procedure is used. It is nigh on impossible for E-Systems to check every single program and procedure on a computer. That said, our suite of removal software is very thorough and will usually inform us if a problem is likely. Whatever happens, by backing up your important information before we undertake remedial work, we safeguard that data just in case disaster strikes.

Key Terms To Understanding Computer Viruses: (More details of each below)

Virus
A program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes.

Trojan Horse
A destructive program that masquerades as a benign application. Unlike viruses, Trojan horses do not replicate themselves

Worm
A program or algorithm that replicates itself over a computer network and usually performs malicious actions

Blended threat
Blended threats combine the characteristics of viruses, worms, Trojan Horses, and malicious code with server and Internet vulnerabilities .

A computer virus attaches itself to a program or file so it can spread from one computer to another, leaving infections as it travels. Much like human viruses, computer viruses can range in severity: Some viruses cause only mildly annoying effects while others can damage your hardware, software or files. Almost all viruses are attached to an executable file, which means the virus may exist on your computer but it cannot infect your computer unless you run or open the malicious program. It is important to note that a virus cannot be spread without a human action, (such as running an infected program) to keep it going. People continue the spread of a computer virus, mostly unknowingly, by sharing infected files or sending e-mails with viruses as attachments in the e-mail.

A worm is similar to a virus by its design, and is considered to be a sub-class of a virus. Worms spread from computer to computer, but unlike a virus, it has the capability to travel without any help from a person. A worm takes advantage of file or information transport features on your system, which allows it to travel unaided. The biggest danger with a worm is its capability to replicate itself on your system, so rather than your computer sending out a single worm, it could send out hundreds or thousands of copies of itself, spidering into a huge devastating effect. One example would be for a worm to send a copy of itself to everyone listed in your e-mail address book. Then, the worm replicates and sends itself out to everyone listed in each of the receiver's address books, and the manifest continues on down the line.

A Trojan Horse is full of as much trickery as the mythological Trojan Horse it was named after. The Trojan Horse, at first glance may appear to be useful software but will actually do damage once installed or run on your computer. Those on the receiving end of a Trojan Horse are usually tricked into opening them because they appear to be receiving legitimate software or files from a legitimate source. When a Trojan is activated on your computer, the results can vary. Some Trojans are designed to be more annoying than malicious (like changing your desktop, adding silly active desktop icons) or they can cause serious damage by deleting files and destroying information on your system. Trojans are also known to create a backdoor on your computer that gives malicious users access to your system, possibly allowing confidential or personal information to be compromised. Unlike viruses and worms, Trojans do not reproduce by infecting other files nor do they self-replicate.

Added into the mix, we also have what is called a blended threat. A blended threat is a sophisticated attack that bundles some of the worst aspects of viruses, worms, Trojan horses and malicious code into one threat. Blended threats use server and Internet vulnerabilities to initiate, transmit and spread an attack. This combination of method and techniques means blended threats can spread quickly and cause widespread damage. Characteristics of blended threats include: causes harm, propagates by multiple methods, attacks from multiple points and exploits vulnerabilities. To be considered a blended thread, the attack would normally serve to transport multiple attacks in one payload. For example it wouldn't just launch a DoS attack — it would also install a backdoor and damage a local system in one shot.

Additionally, blended threats are designed to use multiple modes of transport. For example, a worm may travel through e-mail, but a single blended threat could use multiple routes such as e-mail, IRC and file-sharing sharing networks. The actual attack itself is also not limited to a specific act. For example, rather than a specific attack on predetermined .exe files, a blended thread could modify exe files, HTML files and registry keys at the same time — basically it can cause damage within several areas of your network at one time. Blended threats are considered to be the worst risk to security since the inception of viruses, as most blended threats require no human intervention to propagate.

Protect yourself against ALL of these and much more with Panda Internet Security 2009 or AVG Internet security.

Call us on 01527 889356 or 07779 600056 if you need further information.