Official Nvidia Geforce 378.72 Hotfix driver

Official Nvidia Geforce 378.72 Hotfix driver
https://nvidia.custhelp.com/app/answers/detail/a_id/4405

  This is GeForce Hot Fix driver version 378.72 that addresses the following:

-          Fixed hardware encoding in Steam (In-Home Streaming).
-          Resolved PhysX being forced to CPU when "Optimize for Compute Performance" setting is OFF.