The rule of thumb is, don't install updates of your graphics card on top of existing drivers.
The reason for that is that when you're doing it that way, you're doing it live where components of the driver should be (sometimes) killed and restarted in the windows processes. The problem is that AMD is not in charge of Windows way to shut down and restart the process and Windows is taking the processes very seriously, to the point of refusing to shut for security reasons.
This is why is best to completely delete the GPU drivers in Safe Mode and then install hardware update in normal mode.
This way you can be at least sure that the update procedure is not the cause of your problems.