Unmount the volume if it had already been mounted, replace /dev/sda1 and /mnt/windows, if needed.
Moreover, by defining a Windows-to-Linux user mapping in the file .
NTFS supports several filename namespaces: DOS, Win32 and POSIX.
While the ntfs-3g driver handles all of them, it always creates new files in the POSIX namespace for maximum portability and interoperability reasons.
Use file file-name as the user mapping file instead of the default . If file-name defines a full path, the file must be located on a partition previously mounted.
If it defines a relative path, it is interpreted relative to the root of NTFS partition being mounted.