Dired move file breaks relative symlinks. Maybe we can call this a

bug. I find a workaround with this advice.  I use this to move files

(rel symlinks) around in a git-annex repo without brokening it.  I am

quite new to emacs, I am not sure if that has any side effect.

    (defun my-rename-file (file newname &optional ok-if-already-exists)

    "fix path for relative symlink"

    (if (file-symlink-p newname)

    (let ((target (expand-file-name (file-symlink-p newname) (file-name-directory file))))

          (if (and target (string-equal system-type "gnu/linux") (not (file-exists-p newname)))

              (dired-make-relative-symlink target newname t)))))

    (advice-add #'rename-file :after #'my-rename-file)

There are some complicated examples of dealing with symlink :

https://www.emacswiki.org/emacs/symlink-fix.el

I am not sure if windows has relative shortcuts. This link show you can use symlinks in windows: