Nvidia has released a new Geforce 361.82 Hotfix drivers which should fix the graphics card eject bug seen with the previously released Geforce 361.75 Game Ready drivers.
The bug is an unwanted result of Nvidia's implementation of the support for external graphics via Thunderbolt 3 interface which was introduced with Geforce 361.75 WHQL Game Ready drivers and make the GPU appear as a removable device in system tray, which made it possible to unload the display driver by accident while trying to unmount external storage devices.
The new Geforce 361.82 Hotfix drivers are available over at Nvidia's dedicated support site.
Source:
Nvidia.com.