cmd - start new instance of Windows command line interpreter switch /c - carry out command specified and terminate
rd - remove specified directory switch /s - Remove all directories and files within the specified directory in addition to the directory itself switch /q - Quiet mode, suppress all confirmation messages about directories that are not empty
C:Â¥ - the directory specified in Japanese notation; C:\ aka root of the C: drive
That said, considering that the Windows version is 6.1 (aka Windows 7) which means that she isn't using an elevated Command Prompt because the window title would've been Administrator: Command Prompt. So I'm not sure that this prompt will even get past the first protected system file.