The latest Realtek Drivers can be found here: http://www.realtek.cz/
Unfortunately the adverts on this website can be misleading and you can unwilling end up downloading junk instead of the Realtek Driver.
Do not click any of the adverts marked in a red cross. Select Realtek Audio, Network or Wireless Drivers depending on what you want to install.
Taking the audio drivers for example. The drivers will be listed with ticks or crosses. Any tick leads to a driver for that audio device and version of Windows.
Select download driver again avoiding the misleading adverts.
Note there is a delay before you are prompted for the driver download wait up to 5 minutes for the download to appear. If it does not appear try refreshing the page.
Select save when the dialogue comes up.