Nahimic Companion App is a virtual sound software which comes with MSI motherboards,
often it installs itself without the user's permissions. And uninstalling it is a 
pain and a half:

1. Block nhnotifsys.exe with your antivirus (It's the software that appears in your system tray you can also see it running in the task manager as A-Volute so right click and open file location to find the executable)
2. Open Task Scheduler (run as admin) -> disable/delete NahimicSvc32Run, NahimicSvc64Run, NahimicTask32, NahimicTask64
3. Device Manager (run as admin) -> Sound, video and game controllers -> disable "nahimic mirroring device" (uninstalling it just makes it reappear on next boot, disabling leaves it disabled)
4. Device Manager (run as admin) -> Software components -> disable "A-Volute Nh3 Audio Effects Component" (uninstalling it just makes it reappear on next boot, disabling leaves it disabled)
5. Open Services.msc (run as admin), right click Nahimic, open properties stop the service and then disable it then in the Recovery tab ensure that Take No Action is selected for First, Second and Subsequent failures.