Go into Task Manager (Ctrl+ALT+DEL) and stop the installation process (End Task). This will stop the installation. Now you are going to need to run DDU in safe mode and hopefully it will delete the Partial installation and fix the registry entries. After rebooting, go to Device Manager and see what Driver is displayed under "Display Adapter". If it still is AMD. Go back and run DDU in safe mode again.
After rebooting, Go to Control Panel under "Programs and Features" and check to be sure there isn't any AMD software installed. If there is, try uninstalling it. Then follow this basic installation process:
Try this basic method of uninstalling and reinstalling AMD Drivers.
First download the correct Full AMD driver set from AMD Support for your Computer.
Make sure your Windows 10 is fully updated via Windows Update (including Optionals).
Disconnect the Internet from your computer to prevent it from installing a different GPU Driver than the one you are installing.
Use Windows 10 Uninstall to uninstall all AMD Drivers and software. Then use DDU in safe mode to completely eliminate all traces of the old AMD drivers and software related to the GPU.
Delete C:\AMD Folder. This prevents New and Old AMD driver files from installing and corrupting the installation process.
After rebooting from DDU, Reinstall the new AMD Full set of drivers. If it installed correctly, again delete C:\AMD folder to save Hard Disk space and reconnect to the Internet.