According to a computer virus intrusion system approach can be divided into source virus, computer virus virus, operating system viruses and shell viruses.

按计算机病毒入侵系统的途径可将计算机病毒分为源码病毒、入侵病毒、操作系统病毒和外壳病毒。

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That helps with malware detection because a virus built for one operating system may not be clever enough to hide from another OS.

这种方式有助于检测恶意软件。因为针对某种操作系统编制的恶意软件还没有“聪明”到在另一种操作系统中也能做到隐身不见。

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This might mean installing custom software (like anti-virus programs, JDBC drivers, monitoring agents, and so on), altering operating system configurations (such as network timeouts), and much more.

这也许意味着安装定制软件(比如杀毒软件、JDBC驱动程序、监视代理等等)，修改操作系统配置(比如网络超时)等等。

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"It is a bit ironic, but the fact that Apple currently has such a small market share versus Microsoft 's Windows means that there are far fewer hackers writing virus code for the Macintosh operating system, " says Pile, who notes the premium IT managers place on system reliability.

FORBES: Apple's New Core

Thousands of computers running Microsoft's Windows XP operating system were unable to connect to the internet after installing an anti-virus update.

BBC: Kaspersky anti-virus cuts web access of thousands of PCs