如果允许编程的话，我倒知道一种方法：
引用MSDN（
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Deletes an existing file.
To perform this operation as a transacted operation, use the DeleteFileTransacted function.
The name of the file to be deleted.
In the ANSI version of this function, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "\\?\" to the path. For more information, see Naming a File.
用DeleteFileW（也就是Unicode版本）以\\?\的方式来处理路径，可以使用长度达到32767宽字符的文件名，再长的话可能就要写驱动了。
