Windows 8.1 functionality issues

I have Sony Vaio i5 with 2 USB3.0 with Windows 8.1 and Plugable USB3.0 has ethernet and 2.0 USB ports working but it is not recognizing USB 3.0 HDD. It was working before updating to Win 8.1. What can I do now? The displaylink installed is 7.5. Besides that, the sound when earphone is connected in the Plugable Dock Station is flickering. Thanks in advance.