You need to download the AMD Processor's APU AMD Driver for which both Integrated and Discrete drivers are to be installed.
This is the only AMD APU with HD7420G Integrated Graphics. Your APU is not supported by AMD Updates any more and it considered to be legacy (Old): https://www.amd.com/en/support/apu/amd-series-processors/amd-a4-series-apu-for-laptops/a4-4300m-rade...
You have a choice of two last AMD drivers to install:
1- WHQL 2015
2-BETA 2016
Use DDU with the internet disconnected and deleting the AMD installation folder at C:\AMD and running DDU in Safe Mode (best method) or the Desktop.
Once it boots back into the Windows Desktop run the full AMD driver package that you downloaded. Once it installs successfully, reconnect the Internet and again delete C:\AMD installation folder.