Is there any possibility to make remote backup windows PC?
Do you mean the "Remote Backup" option in the web interface? This is based on the rsync protocol. Intended target systems are other D-Link NAS devices or Linux systems. For Windows, rsync is not really established. Yes, rsync is available for Windows but I think this might require some manual effort to get this working.
Do you want to make a backup Windows ==> NAS? Or NAS ==> Windows?
For Windows ==> NAS, you could use any windows backup software for this and specify the NAS as target.
And how to put security code on DNS 327L because when I connect him on my network then all connected computers can see what is in it.
Seems the configuration is bad. What groups and users did you configure on your NAS?