Technical Zone

The most common blunder when the topic of a computer virus arises is that people will often refer to a Worm or Trojan Horse as a Virus. While the words Trojan, worm, and virus are used interchangeably, they are not the same. Viruses, worms, and Trojan Horses are all malicious programs that can cause damage to your computer, but there are differences between the three, and knowing those differences can help you to better protect your computer from their often damaging effects.

A computer Virus attaches itself to a program or file so it can spread from one computer to another, leaving infections as it travels. 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.

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 ability 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 ability 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, creating 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 book, and the manifest continues on down the line. Due to the copying nature of a worm and its ability to travel across networks the end result in most cases is that the worm consumes too much system memory (or network bandwidth), causing Web servers, network servers, and individual computers to stop responding.

A Trojan Horse is full of as much trickery as the mythological Trojan Horse it was named after. The Trojan Horse, at first glance will 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. The Trojan horse itself would typically be a Windows executable program file, and thus must have an executable filename extension such as .exe, .com, .scr, .bat, or .pif. Since Windows is sometimes configured by default to hide filename extensions from a user, the Trojan horse is an extension that might be “masked” by giving it a name such as ‘Readme.txt. exe’. With file extensions hidden, the user would only see ‘Readme.txt’ and could mistake it for a harmless text file. When the recipient double-clicks on the attachment, the Trojan horse might superficially do what the user expects it to do (open a text file, for example), so as to keep the victim unaware of its real, concealed, objectives. Meanwhile, it might discreetly modify or delete files, change the configuration of the computer, or even use the computer as a base from which to attack local or other networks – possibly joining many other similarly infected computers as part of a distributed denial-of-service attack. Unlike viruses and worms, Trojans do not reproduce by infecting other files nor do they self-replicate.

Added into the mix, 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.

To be considered a blended thread, the attack would normally serve to transport multiple attacks in one payload. For examplem it wouldn’t just launch a DoS attack — it would also install a backdoor and damage a local system in one shot. 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.

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Windows 7 Home Premium full retail product is $40.00 less than Windows Vista Home Premium today.

In the U.S., this means a customer buying Windows 7 Home Premium upgrade will pay only $119.99 instead of the $129.99 being charged today for its predecessor.

Overall, customers will be paying less and getting more with Windows 7. This includes fun new features such as HomeGroup, Device Stage, Aero Shake, Snap, Peek, Jump Lists and our completely redesigned Windows Taskbar (one of my favorite new features in Windows 7 today). These new features make your PC simpler and much easier to use.

So here’s the low-down on pricing for Windows 7.

And the estimated retail prices for full packaged retail product of Windows 7 in the U.S. are: Windows 7 Home Premium (Upgrade): $119.99 Windows 7 Professional (Upgrade): $199.99 Windows 7 Ultimate (Upgrade): $219.99
The retail prices for full-packaged retail product of Windows Vista in the U.S. are: Windows Vista Home Premium (Full): $239.95 Windows Vista Business (Full): $299.95 Windows Vista Ultimate (Full): $399.95
The retail prices for full-packaged retail product of Windows XP in the U.S. are: Windows XP Home Edition Upgrade: $99.99 Windows XP Home Edition Full: $199.99 Windows XP Professional Upgrade: $199.99 Windows XP Professional Full: $299.99

Hi Folks,

We all know that Windows Media player does not support FLV file format, for playing FLV files on your Windows Operating system, either you have to install any FLV player or you can simply download this plug in playflv from(playflv) The installation package that enables Windows Media Player to play FLV (Flash Video) files. PlayFLV plugin binds FLV files to Windows Media player so when you double click on the FLV files it directly open in Windows Media Player. PlayFLV Plugin is very easy to install simply download it and double click on it will automatically install on to your system.

Cheeeerrrrss Enjoy