If you are using server core or Hyper-V 2012 (the one without the GUI installed) there is no graphical interface to device manager. You have to use PowerShell for that. Here are the details
Tips and notes from a techno geek
If you are using server core or Hyper-V 2012 (the one without the GUI installed) there is no graphical interface to device manager. You have to use PowerShell for that. Here are the details