For performance reasons, antivirus software is best avoided — which means that for security reasons, you can't allow a network connection to the machine.

出于性能考虑，最好避免使用反病毒软件——这就意味着为了安全起见，不能将该机器连接到网络。

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As new antivirus tools are more powerful than before, the virus writers are getting a lot smarter with newer and creative ways to attack network systems.

随着抗病毒工具比以前更为强大，病毒的编写者也变得越来越聪明，使用更新和更具有创造性的方法攻击网络系统。

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On the other hand, from the entire Internet environment it, free antivirus software has also make the network environment has been greatly improved.

另一方面，从整个互联网环境来说，免费杀毒软件的普及也使网络环境得到了极大的改善。

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This revenue number includes antivirus, antimalware and network-security software.

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This attack can put corporations at risk because telecommuters often fail to regularly update their antivirus software, said Sal Viveros, group marketing manager for total virus defense at Network Associates Inc.(NAI) in Santa Clara, Calif.

CNN: New 'Trojan Horse' strain may go mainstream

According to Network World, some 22.4 percent of Google searches performed since June produced malicious URLs (such as fake antivirus sites or malware downloads) as part of the top 100 search results, as opposed to 13.7 percent in the second half of 2009.

ENGADGET: Report warns of the increased use of SEO Poisoning to spread malware