最近在桌面莫名其妙多了一个文件 “CAUNWLMJ.”，删除的错误信息为“cannot delete cannot read from the source file or disk”。在安全模式下一样，在dos用dir /a能看到文件但是也删不掉。

查了一些文章，结果是“What has happened is that the hacker has added a character to the end of the folder that Explorer does not recognize.”

解决方法是，用dir /x/a查看文件，会得到一个dos8.3的name，本文件为CAUNWL~1，然后del /a即可。

/x的参数会得到一个dos认识的文件名，然后系统可以删除。

dos还是很强大地。