A virus is a kind of malware that propagates by placing copies of itself into other computer system programs or files, in order to take impact when these programs or files are run or opened.

There are lots of ways for a virus to spread out. The most typical is via e-mail accessories. A virus can be sent as an attachment in an email, and when the e-mail is opened, the infection will immediately be activated and will begin infecting the computer. The virus can also spread out through detachable media such as USB drives or DVDs. If you insert a USB drive into your computer that is contaminated with an infection, the infection will instantly start copying itself onto your computer. Another method viruses can spread is by downloading infected files from the Web. If you download a file from a website that is infected with an infection, the infection will be downloaded onto your computer in addition to the file.

If you click on a link that is infected with a virus, the infection will be instantly downloaded onto your computer worm definition (hop over to this website). When a computer is contaminated with a virus, the infection can make changes to the computer system's settings, 20 types Of computer viruses which can make the computer system more vulnerable to other infections.