I know I simple fix that always works. It is the following:
Download the latest driver.
When installing the driver, press more options in the beginning, then select factory reset, then select remove saved presets etc.
Restart when prompted, install driver, restart again. Done.
This always works for me and should work for you too. Nothing else is needed, and I do wonder if other people who got it working was rather due to reinstalling drivers, and not adjusting fan speed.