Hi, lades and gents. I have an HP computer with Windows 10. My audiobox USB and Presonus software/hardware work fine! The problem comes in when I detach the device from my computer and shut down the Presonus software. After I detach and switch off, I am still receiving audio output through my headphones. It's picking up my voice, my keystrokes, my fan, the A/C, etc. all the while my hardware and software is turned off and disconnected. Is there a way to adjust my audio settings to get rid of the noise?