电脑病毒是一种具有自我复制能力的电脑程式。在电脑科学里，电脑病毒是一段象生物病毒一样的程式，它会复制自己并传播到其他宿主，并对宿主造成損害。宿主也是程式，通常是作业系統，从而进一步传染到其他程式、其他的电脑。电脑病毒在传播期间一般會隐藏自己，由特定的出发條条件触发开始产生破坏。电脑病毒指一組执行代码， 可透过付与其他档案或取代其他程式而自行复制。
电脑病毒是由人工编制的,有着特定功能的电脑程序.像我们熟悉的确良word,excel一样,只能执行编制者为他编制好的功能.但他又和正常的程序有着本质的区别,它不能堂而皇之的存放在你的电脑里,它必须找一个合法的程序,然后寄生在这个合法的程序里面以达到不被人发现的目的。

关键字：自我复制能力；程式；宿主

Windows system safety viral protection
ABSTRACT

The computer virus is one kind has the self-duplication ability computer program. In the computer science, the computer virus is a section of elephant biology virus same program, it recovers makes themselves and disseminates other hosts, and creates the harm to the host. The host is also a program, usually is the work system, thus further infects to other programs, other computers. Computer virus in dissemination period generally will hide itself, by specific will embark condition triggering to start to have the destruction. The computer virus refers to a group to carry out the code, permeable has attached in other files or substitutes for other programs, but duplicates voluntarily