Black Screens
 

Just updated to Windows 8.1 Enterprise from Windows 8 Pro. My two monitors were displaying just fine for a day. Upon reboot of the computer, I have no display on either. They are powered and recognized by Windows and the Display Link software, but they just display black. You can drag windows between them. Updated video drivers and monitor drivers. Still black. Plugged in USB display device and then the monitors. Still black. Logs are attached.

Fixed it. Uninstalled all Nvidia software and disabled the Nvidia GeForce GT 630M device from the device manager. Currently have the Intel HD Graphics 4000 as the display adapter. All seems happy once again.