From a command line, type “net use * /delete”, this will disconnect any mounted share.
In the User account and family safety control panel, go to the windows credentials manager and delete any stored credential for your NAS.
Reboot the computer.
Upon startup, access a private share on the NAS (not the public one, or you will be set with the guest credentials on the NAS for that Windows session). Map the share as a network drive and choose to reconnect at login.
