[单选题]下面关于计算机病毒说法不正确的是______。

A、正版的软件也会受计算机病毒的攻击
B、杀毒前应先断开网络
C、任何防病毒软件都不会查出和杀掉所有的病毒
D、杀完毒后，应及时给系统打上补丁，否则系统无法正常运行

参考答案： D

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