How to Use "antivirus" with Example Sentences

1. Tencent retaliated by cutting off its qq instant-messaging service for users of qihoo antivirus software .

2. They 'll get around to windows 7 , although its built-in antivirus facility has been well-reviewed .

3. Is there a way for antivirus apps to work ?

4. Why didn 't you tell us about the antivirus ?

5. Malware writers and antivirus firms are two obvious audiences .