Below you will find the last driver for the Dell Inspiron 14 3420 Notebook 1703 Bluetooth adapter. The driver is a Windows 7 32-bit and Windows 64-bit driver. You can download the file below from the Dell website. Note how the dell drivers are normally installed.
Note that the file below is a large file. Once you download the file it will extract the files to a directory on your “C” drive. It will normally be a “Dell” directory. You need to browse to this Dell directory on your “C” drive to install the driver. The setup process is unique to Dell computers. Once in the directory you will need to click on the setup file and it will install the driver. Simply click the ‘close’ button when done and you driver has now been installed.