On a Windows computer the root is the physical drive 50 on which the file is stored, and for most home computers the name of the hard drive that stores all your files is C: and therefore most file nam...On a Windows computer the root is the physical drive 50 on which the file is stored, and for most home computers the name of the hard drive that stores all your files is C: and therefore most file names on Windows begin with C:. After that comes the folders, and on Windows the folder names are separated by a \ symbol.