Some grayware can collect users' information without their knowledge and use the information for commercial purposes.
一些灰色软件可以在用户不知情的情况下收集用户的信息，并将这些信息用于商业用途。
A lot of grayware does not come with uninstaller or with uninstalling capabilities hidden, or even protect the programs so that normal users will have difficulties in uninstalling them.
很多灰色软件并不提供卸载程序，或者卸载功能很隐蔽，甚至故意对程序实施某种保护，普通用户很难卸载。
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