| 1. | 5 . disable or uninstall any antivirus programs
5 .禁用或卸载所有反病毒程序。 |
| 2. | Most av programs use a database of known virus signatures
大多数反病毒程序使用已知病毒特征数据库。 |
| 3. | You may not be able to as easily ensure that those systems have updated av protection
您不易确认这些系统已经更新了反病毒程序保护。 |
| 4. | To protect against new viruses for which definitions are not yet available , av programs can use heuristics
要对抗新病毒，病毒库定义不再有效，反病毒程序可以使用试探法。 |
| 5. | On the other hand , host - based av programs are relatively inexpensive and simple to deploy on small networks
另一方面，基于主机的反病毒程序在小型网络中部署时比较便宜、简单。 |
| 6. | Since new viruses are created and released daily , the antivirus program must update its database frequently
因为新病毒天天创建和发布，反病毒程序必须频繁地更新其（病毒特征）数据库。 |
| 7. | A computer virus that actively attacks an anti - virus program or programs in an effort to prevent detection
一种可以活跃地攻击一个反病毒程序或者其他程序而达到防止被软件所发现的病毒。 |
| 8. | Some av programs use integrity checking to determine if files have been changed ( such changes can be due to viruses )
一些反病毒程序使用完整性检验来确定文件是否被改变（这类改变可能应归于病毒） 。 |
| 9. | A more effective antivirus program is going to have less work to do , because viruses will have fewer opportunities to attack your systems
一个更有效的反病毒程序则更少机会被激活，因为攻击系统的病毒数量更少了。 |
