Unfortunately, many computer users have experienced firsthand the effects of malicious mobile code, including viruses and worms, which can damage or destroy data and cost time and money.

遗憾的是，许多计算机用户都亲身体验过恶意移动代码(包括病毒和蠕虫)造成的后果，这些代码可能会损坏或毁坏数据，并会浪费时间和资金。

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The Virus Bulletin tests try to catch out anti-virus software with a variety of malicious programs including bots and worms known to be spreading online, file infectors, polymorphic and macro viruses.

BBC: NEWS | Technology | Windows 'fails' active virus test