There are many "urban legends" when talking about the virtual world, I think the first is that the virtual world is "no man's land", there are already laws and penalties for those who transgress the rules of good neighborliness and common sense on the Internet. But this is not my focus in this article, I want to list four things you need to know about internet.

1 - Computer viruses, that "radius" is that? (Quiet PC you will not spend any disease!).

In computing, a computer virus is a malicious program developed by programmers who, like a biological virus infects the system, makes copies of itself and tries to spread itself to other computers, using different means.
After the machine is infected there are several problems that appear, the first is slow, errors of execution of programs (that annoying little screen to send the report to anyone who uses Windows XP or higher) and the famous crash. Of course, the errors are not limited to these symptoms can occur blue screen (and that locks blue screen of death - just missing the back of Star Wars).

2 - What are the main types of viruses?

Boot sector viruses
It is one of the early days of viruses, it infects the MBR system (Windows startup), so every time the system is booted the virus also.

Time Bomb (or bomb)
They are viruses that infect the machine without anything being noticed by the date specified by its developer, Some viruses have become famous, like "Friday the 13th", "Michelangelo," "Eros" and "April 1 (Conficker)."

Trojans or Trojan horses (more chatinho)
For those who watched the film has an idea (that's Brad Pit is where the ladies sighing, only you know he used a stunt double for thighs kkkkkkkkkk).
Basically (as in the movie) you believe you are receiving, or downloading, something that is useful theoretically, but actually the program comes with a Trojan. Formerly the Trojans came with viruses today with increasing Downloads is no longer necessary that a machine is necessarily with symptoms of infected machine so it is with Trojan horse.
A Trojan horse may have the function to steal data from your computer (including everything you type and everything you click) or you can have the function to enable remote command execution, ie, it can give its owner the power to control their PC without you having this notion.
Another consequence is the computer becomes a zombie, and without the user noticing, perform actions like sending spam if autoenviar to infect other computers and servers to attacks (usually a DDoS Attack abbreviation for Distributed Denial of Service .)
It was once shot down a Yahoo once, a lot of infected machines accessed simultaneously from all parts of the world's yahoo site, the servers came in bolts due to connection and so bitter.

Hijackers
Hijackers are programs or scripts that "hijack" Internet browsers, especially Internet Explorer. When this occurs, the hijacker changes the browser home page and prevents the user to change it, displays advertisements in pop-ups or new windows, install toolbars in the browser and may prevent access to certain sites (such as antivirus software sites , for example).

Orkut Virus
Around 2006 and 2007 there have been many instances in Orkut virus that is able to send scraps (messages) automatically to all contacts in the victim's social network, and steal passwords and bank accounts of an infected computer by capturing keystrokes and clicks.
You know those small screens coloridinhas those scraps with deseinhos, that story of "look at the pictures link", "Ronald Regan died, and see the photos from" and a lot of nonsense ... This is in most cases vitus.

Virus for emails
Personal ... Do you know the main weapon that the crackers have to infect your PC?
(I do not write no wrong, is the same cracker, Hacker is a professional security and test areas critical test several vulnerabilities, the guy who invades, defiles and spoils is a cracker)
The main weapon, or better, the principal can be summarized in:
A - Wanting to do well (you do not want to earn some money without ... that does not exist, it would be all good. But it's easier to leave money in your account without wanting to enter the ... believe, own experience).
B - Curiosity (those e-mails to "love our pictures look at the motel," oh you think I did well ... ummm ... but ... you got it bad if you click ... and that counts for links that you receive as well as the alleged "photos "attached. Even though you know the sender)
C - Fear of being horn (a) ("look what they did to you" or "you do not deserve it" or "pictures of her boyfriend (a)" this is all a lie ... if you click will obviously have a headache, not by Horn but because your pc will turn the "wrong side" [saw this metaphor is, the pc will not be contrary to])
Just use common sense:
No, Lotomania, telesena and other games with remuneration schemes will not send you an email winner!
No, no one will be nice to send pictures of your spouse (you can even send but not anonymous), and would not send in a link to click, the files would be displayed automatically when you open the email.
No, Unilever or Nestle or another big brand and / or company will not have a bank account statement via e-mail showing that money deposited into your account or won some gift.
No Bill Murray did not die, but if you have doubts, go into the TV globo.com site (oh my place!)

3 - Simple Rules
Received some strange content? Call or e-mail to the sender asking what it is, (if you know for a friend), if one does not know what you are talking to delete the message without opening. If the person sending the check and say what is already in the e-mail is less risky.
He received an email from someone who does not know? It is a content telling you to access something? DELETE
Casa Bahia, cerasa, SPC, Bradesco and other large institutions do not send e-mail. (Unless you register and ask).

4 - It is possible to disinfect?
Depends on the computer you have to get used to this term, because everything is conditional, it all depends on how things are and how they were ... There is nothing "automatic" when it comes to computer problems. The problem is not getting the virus, the problem is knowing what he did on your computer .. If you have an updated antivirus, running, viruses are known to be refused entry (including Trojans). If you have been infected by a virus even with antivirus running this means that the virus is not known (yet), so can hardly be removed by the antivirus. In this case, depending on the situation, it pays more than you (or a technician you trust) to format your computer ... This is done by a professional is quick and painless ...
Update the operating system also avoids a lot of headaches ...

Doubts? send an email Fabio@tudoemtec.com.br
Until next time (I'll talk about copyright in images of your online store) ... Wait!

Sources
http://pt.wikipedia.org/wiki/V% C3% ADrus_de_computador (Read, is very interesting, I took part of the text here)

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