计算机病毒英语介绍

COMPUTER VIRUSES

What are computer viruses?

Computer viruses are bits of code that damage or erase information, files, or software programs in your computer, much like viruses that infect humans, computer viruses can spread, and your computer can catch a virus when you download an infected file from the Internet or copy an infected file from a diskette. Once the viruses is embedded into your computer’s files, it can immediately start to damage or destroy information, or it can wait for a particular date or event to trigger its activity.

What are the main types of viruses?

Generally, there are two main classes of viruses. The first class consists of the file Infectors which attach themselves to ordinary program files. The second class is system or boot-record infectors: those viruses, which infect executable code, found in certain system areas on a disk that are not ordinary files. What kind of files can spread viruses?

Viruses have the potential to infect any type of executable code, not just the files that are commonly called “program files”. For example, some viruses infect executable code in the boot sector of floppy disk or in system areas of hard drives. Another type of virus,

known as a “macro” virus, can infect word processing and spreadsheet documents that use macros.

What do viruses do to computers?

Viruses are software programs, and they can do the same things as any other program running on a computer. The accrual effect of any particular virus depends on how it was programmed by the person who wrote the virus.

Some viruses are deliberately designed to damage files or otherwise interfere with your computer’s operation, while other don’t do anything but try to spread themselves around. But even the ones that just spread themselves are harmful, since they damage files and may cause other problems in the process of spreading.

什么是计算机病毒？

计算机病毒是一些能破坏或删除计算机中的信息、文件或程序的代码。正如感染人体的病毒一样，计算机病毒能够扩散。当你的计算机从互联网上下载一个被感染的文件，或者从磁盘上复制一个被感染的文件时，你的计算机就会染上病毒。而一旦病毒进入到你的计算机文件中，它就能马上破坏或摧毁其中的信息，或者等到某个特殊的日期或事件来临时才触发其破坏活动。

个人计算机病毒主要有哪些类型？

一般来说，主要存在着两类计算机病毒。第一类由文件感染型病毒组成，他们将自身依附在普通的程序文件上。第二类病毒是系统病毒或引导区记录感染型病毒，这些感染可执行代码的病毒出现在磁盘的某些系统区中，而不是普通文件中。

哪些文件可以传播计算机病毒？

计算机病毒有感染任何可执行代码的潜力，不仅仅是通常叫做“程序文件”的文件。例如，某些计算机病毒感染软盘引导区或硬盘系统区域的可执行代码。另外有一种叫做“宏”。

计算机病毒对计算机做什么？

病毒是软件程序，它所做的事情与计算机上运行的任何其他程序所做的事情相同。任何一个特别病毒的实际效果取决于编写病毒的程序员是如何编写的。

有些病毒有意设计为损坏文件和妨碍计算机的运行，也有一些病毒只传播自己而不做其他任何事情。但即便只传播自己的病毒也是有害的，因为它们在传播过程中损坏文件，还可能引起其他问题。