病毒可以修改注册表键值、注入系统核心文件中，并且避开卸载软件。
A virus can change registry keys, attach itself to core system files, and evade uninstaller programs.
这是因为卸载代码使用安装注册表来识别所安装的组件。
This is because the uninstall code USES install registries to recognize the installed components.
安装注册表的可用性至少能够支持使用卸载机制。
The usefulness of the install registries is, at least, enabling the uninstall mechanisms.
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