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。
2
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.