Source code viruses are the least - common viruses because they are not only hard to write , but also have a limited number of hosts compared to the other types 源码型病毒是最少见的病毒程序，因为它们不仅编写困难，而且与其他类型的病毒相比，受它们破坏的主程序数目也有限。
Callous virus writers are using the london bomb attacks to spread a malicious program on computers across the country . checked by norton antivirus . exe 那些冷酷无情的电脑病毒编写者们现在开始在全英范围内传播一种新的病毒程序，这次他们选用的题材便是刚刚发生的伦敦连环爆炸案。
Finally , host - based av programs are under the control of the individual user . users may turn off the av program or change its settings , or open files that have been quarantined 最后，基于主机的反病毒程序处于个人用户控制下。用户可以关闭反病毒程序或改变其设置，或者打开已被隔离的文件。
In the same time , trusted computing platform can prevent the run of virus program and malicious code . this platform also solves the security problem of encrypt system and run environment 同时,能够阻止病毒程序、恶意代码程序的运行,这样可信计算平台解决了加密系统及其运行环境的安全性问题。
Mail server - based av programs that scan incoming and outgoing e - mail messages and attachments for viruses and intercept them before they reach users ' mailboxes or are sent out over the network 基于邮件服务器的反病毒程序对进入和外出邮件信息和附件进行病毒扫描，在有毒邮件到达用户邮箱或发送到网络前中断。
If a company relies on host - based antivirus to protect the network , they may overlook laptops that employees bring in to connect to the network or home computers from which employees connect remotely 如果公司依赖基于主机的反病毒程序来保护网络，他们可能没注意到员工带来的接入网络的膝上型电脑或者员工远程连接的家用电脑。
With more and more smart phones shipped every year your phone is becoming a lot more attractive to virus writers and unlike traditional pc viruses , there ' s a much higher chance that a virus on your phone will hit you in the pocket 每年有越来越多的智能手机的病毒程序编写者在写病毒程序,还不像传统的电脑病毒.所以在口袋中的手机有很大的机会被病毒攻击
Host - based av programs usually do a good job of detecting viruses in email and are essential to protect against viruses introduced locally ( for example , via a floppy disk , usb key or cd ) , but don ' t protect as well against viruses that come in via web pages or im 基于主机的反病毒程序通常在检测电子邮件病毒和防止本地引入的病毒（例如，通过软盘， u盘或cd ）方面做得很好，但在对通过网页或im传播的病毒表现不够。
Many kinds of technology , such as api hook , winsock spi , are utilized in user mode , but the fatal flaw of these kinds of technology is that they are only confined on the winsock layer , so many trojan horses and viruses can directly call tcp / ip through tdi instead of winsock to send and receive data 在用户模式下可以采用apihook 、 winsockspi等技术。但是这些技术最致命的缺点就是只能在winsock层次上进行，一些木马和病毒程序很容易绕开winsock而直接通过tdi调用tcp ip发送和接收数据，那么使用上述的技术显然就无能为力了。
