nulgfx.drv is a nulgfx
belonging to 3ds max
from Discreet, a division of Autodesk, Inc.
Non-system processes like nulgfx.drv originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues