Click on the link that I posted in my previous reply and download the correct AMD Driver for the Windows version you have installed and save it.
Download DDU (Display Driver Uninstaller) from here - Wagnardsoft DDU Download and run it AFTER deleting the AMD Folder located at C:\ Root directory. Every time you run a AMD driver package it creates an Installation folder at C:\AMD.
When you run DDU program you must have the Internet/WiFi disconnected to prevent Windows from installing a different AMD driver.
Now run the downloaded AMD Driver and see if it installs successfully and you have no more errors.
If it does, reconnect the Internet/WiFi and again delete C:\AMD installation folder if created.