What are the most common sources of viruses?

Answer 1

It may be caused by putting an infected USB flash drive or cd/dvd into your computer, opening an infected email, downloading infected files, going to websites that are dangerous, etc.

Viruses can come as Trojans, pop-ups or files that may have downloaded themselves while you were on your sites. Other times, it can come from infected USB drives, diskettes, or networks.

Answer 2

Viruses are often embedded in email attachments. They usually have an executable extension such as .exe, .com, or .chm. Often they are compressed into password protected ZIP archives to avoid antivirus scanners built into the mail servers and clients. Occasionally the viruses are embedded as macro scripts in other types of files such as .doc, .pdf, etc... There has even been instances of virus code being embedded in JPG images files (GDI+ bug).

Another common source of infection is by visiting a website which has either been compromised and embedded with malware, or which is malicious in nature. For example, many password trading websites and WAREZ sites contain viruses. By simply visiting the site with a vulnerable browser, you may be infected by a virus. This is becoming more common as attackers are compromising legitimate sites and embedding malware.

Another source of infection is by inserting flash drives, or other portable media into an infected machine, and then into an uninfected machine. Viruses are often designed to transfer themselves to portable media in an effort to physically transport themselves to new environments.

Finally, it is also possible to infect a machine by targeting vulnerabilities in network software such as windows file sharing or a web server like apache.

Answer 3

The source is usually a computer nerd.

Some make viruses as a form of grafitti. 'Look at me', 'look what I can do', 'aren't I brilliant?'.

Others are made to actually rip you off, one way or another. They self replicate and can infect many files on many computers, spread like biological viruses.

They can persuade you to give up your personal details or just take them anyway, using your internet connection to upload details back to where they originated, so the details can be used.

The source can be a nerds bedroom, or the heart of an organised gang.

Answer 4

Computer virus' come from the internet, they are created by other computer users for a wide varity of reasons but mostly for pure evilness

Answer 5

People create viruses on their computers, then the virus spreads to other computers when people visit websites or such with viruses.

Answer 6

opening an email attachment (storm worm), clicking on a link, and installing software (conficker.a,b,c, or x)

Answer 7

sources from where virus come to the computer

Answer 8

Retards use their computers wrong. Like what the heck??