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TYPES OF VIRUS

" What is a virus?

A virus is computer code that attaches itself to a program or file to spread from one computer to another. It infects as it travels. Viruses can damage your software, hardware and files.
A virus attaches itself to a host program then attempts to spread from one computer to another. It may damage hardware, software or information.
computer viruses range from mildly annoying to the downright destructive. The good news is that a true virus does not spread without human intervention. Someone must share a file or send an email to propagate.

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What is a worm?

A worm, like a virus, is designed to copy itself from one computer to another, but does so automatically. First, take control of the characteristics of the computer that can transport files or information. Once a worm in your system, you can travel alone. The great danger of worms is their ability to replicate in large numbers. For example, a worm could send copies of itself to all users in your address book, e-mail, causing a domino effect of heavy network traffic that would slow the business networks and the Internet in its entirety. When new worms are unleashed, they spread very quickly. Clogging networks and possibly making you wait long (at all) to view Web pages on the Internet.
Generally, worms spread without user action and distributes complete copies (possibly modified) of itself across networks. A worm can consume memory or network bandwidth, which can cause a computer to crash.
Because worms do not have to travel through a program or file "host" can also tunnel into your system and allow somebody else to take control of your computer remotely. Recent examples of worms include: sasser and blaster.

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What is a Trojan?

Trojan computer program that appears useful but actually causes damage.
Just as the mythological Trojan horse appeared to be a gift but contain Greek soldiers who overtook the city of Troy, the Trojans today are computer programs that appear to be useful software but endanger the security and cause extensive damage . A recent Trojan came as an email message that included attachments claiming to be Microsoft security updates, but turned out to be viruses that attempted to disable antivirus software and firewall.
Trojan horses spread when people are lured into opening a program because they think it comes from a legitimate source. To better protect users, Microsoft often sends out security bulletins via email, but never contain attachments. We also publish all our security alerts on our Security Web site before emailing to our customers.
Trojans can also be included in software that you download for free. Never download software from a source that you do not trust.

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What is spyware? Spyware

called to files or software applications that are installed on the systems, sometimes without the knowledge or authorization of users and after that they accept the "Terms of Use." These files run in the background when users are connected to the Internet.

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LightScribe Technology

The LightScribe technology created by HP, combining units recorders, records especialmetne designed to be printed on its surface and a software that can record and print silkscreen-quality designs. The system LightScribe lets you burn and print with the same unit. There are external drives to connect to the PC.

technology components:

- Hardware: Allows you to record and print with the same laser (Hay Burners Double Laser)

- Software: Software that lets you design your creations to disk and then print .

- Supports: The LightScribe media have a special surface that allows you to print it.

LightScribe is compatible with Windows, Mac and Linux This technology allows you to record laser in three different grades: draft, normal and optimal. You can combine text and images, except that for now the designs are monochromatic.

"The LightScribe is a new concept when it comes to label the CD or DVD with a professional quality without the need for printers and labelers. Recorders equipped with this technology allow the same laser that writes data to disk can also burn text and graphics onto the surface of the discs soporte.Recordar that also have to support this technology, not just any CD or DVD. "

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LCD MONITORS PRINTERS

Laser Printer

Operation

A laser printer is a type of printer that can print text or graphics in both black and color with high quality.
Laser printers work by creating an electrostatic image of a full page on a photosensitive drum with a laser beam. When applied to the drum color Ultrafine powder called toner, it binds only to the sensitized areas corresponding to the letters or images on the page. The drum rotates and is pressed against a sheet of paper, transferring the toner to the page and creating the image. This technology is similar to that used copiers, although there are differences in the details of the transfer the image and the internal temperature of the units.

Thermal Printers

Operation

thermal printers work inkjet ink cartridge overheating to about 400 º F. This produces vapor bubbles inside the cartridge, which rise to the top of the chamber. Steam pressure forces the ink out of the cartridge through the nozzles into tiny droplets that form the dots on the page. The vacuum created by the ejected ink pushes ink into the nozzle, generating a steady flow of drops required.

Piezoelectric Printer

Operation

piezoelectric print heads can use ink dries faster and pigments could be damaged by temperatures of a head Thermal also has a piezo head printer is integrated. Just need to replace an ink cartridge. (Thermal printers include nozzles for each ink cartridge, which increases the cost of the cartridge and the cost for both pages.) The disadvantage that if a piezo head is damaged or gets stuck, it is necessary to repair the printer