The Vostro 5470 comes with a Realtek PCIe network card which is used by a number of other Dell computers such as the Vostro 5480 as well as the Inspiron 3043. The driver below for the Vostro 5470 is a Windows 10 32bit as well as a 64bit driver. You can download this driver below which is in a zip file which is easy to install. The driver was last updated in October 2015 and this is version 10.1.505.2015, A00 of the software. See below how to install the driver once it has been downloaded.
Vostro 5470 : Realtek PCIe GBE Network Driver
You can search this website for more drivers for this computer as well as others. Download the file and open the zip file. The file is large at 27MB so you need to check your bandwidth if this is going to be a problem for you. Open the zip file and there is the driver file. Click on the file and it will install the Realtek GBE network driver. This will install the driver or extract the driver into the C:\ drive where it will create a Dell directory. Open the directory and click on the install file if the driver did not install the first time. This takes a few seconds and that is about it.
Version : 10.1.505.2015, A00
Last Updated : 01 Oct 2015
Supported Operating Systems : Windows 10, 32-bit Windows 10, 64-bit