Go to the "Start" menu and type "cmd".
Right-click on the "cmd" and choose "Run as administrator".
In the following window, type "mklink /d".
Open the "Dropbox" folder and copy the folder's path.
Paste it into "cmd" window. In the same line, type "<new folder name>". Go to "My Documents" folder and copy the folder's path.
Paste it into "cmd" window. Press "Enter" key and you will see a message – "symbolic link created".
Go to the "Dropbox" folder. Open the "linked" folder. All files from "My documents" folder are synced.
Example: mklink /d "c:\users\test\Dropbox\<folder_name_to_create>" "c:\users\test\Documents"