Anti-virus programs are necessary but don’t always guard against intrusions.

反病毒程序是有必要用的但是仍不能够经常的阻止渗透。

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A few days ago we mentioned the protection mechanism that Sober USES to keep anti-virus programs from detecting it.

几天前我们谈到了Sober病毒所使用的用来保护自己以使其自身不被反病毒软件所删除的保护机制。

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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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In an attempt to avoid being spotted by anti-virus programs that look for particular signatures, Bugbear.

BBC: Virus makes unwelcome return

However, because it uses a double suffix on the attachment filename, many anti-virus programs should be able to pick it out.

BBC: Virus makes unwelcome return

The spam messages have been changed to capitalise on news events and the viral payload has been updated many times to fool anti-virus programs.

BBC: NEWS | Technology | Bloggers battered by viral storm