I would follow this basic method of installing new AMD Drivers:
install AMD driver:
1) Download the correct AMD Full Set of drivers from AMD Support. Make sure your Windows is fully updated via Windows Update. Windows Must be fully updated because the latest AMD Drivers requires all the latest "Optional" and "Recommended" updates to be installed.
2) Use Windows Uninstall to uninstall current AMD driver and software and disconnect the internet from your computer. Then use DDU (Display Driver Uninstaller) Display Driver Uninstaller (DDU) from Wagnardsoft Forum in Safe Mode. This will eliminate all traces of the AMD driver and software from your computer.
Delete C: \ AMD folder from the Root Directory. Reboot
3) Go to Device Manager and click "Display Adapter" and make sure you are on the MS Basic Display Adapter. If not, uninstall the AMD driver using Properties.
4) Try reinstalling the AMD FULL SET OF DRIVERS that you have downloaded manually. Make sure you disable the Internet to prevent Windows from installing a newer version. So configure windows to prevent it from updating drivers via windows update. So it has been mentioned to disable any anti-virus programs before installing AMD Drivers.
5) If the new AMD drivers installs and works correctly, delete again the C: \ AMD folder from the root directory. To save space on the HDD.
6) Enable both the Internet and Anti-Virus program (if applicable).
7) Go back to Device Manager and check your GPU card driver is working and identified correctly.
Here is the latest AMD Driver for the RX590: Radeon™ RX 590 Drivers & Support | AMD
After installing the driver as per above procedure, Go to Device Manager and see:
1) See if your RX590 AMD Driver is running without errors
2) See if AMD HD Audio Device is showing
3) Make sure there are no yellow Exclamation marks or Errors showing for any driver.
Now go to Windows Sound Panel and select your Default Audio device with AMD Audio. Make sure you have your HDMI cable connected to the RX590 and under BIOS the RX590 is the main Graphic adapter for booting into Windows and not your Integrated Graphics.