Im no expert but have a look into where you have installed NR2003, look for a file called " rend_dxg " .
In there open with notepad and change and save so it looks like below. time to time the game resets this file eg; video driver update. should be good to go. may save a copy of this changed file and put it somewhere to use as a reference as it will happen again sooner or later.
[3D Accelerator Analysis]
PolyRate=121.20
AnisotropicLevel=0 check this , if not set to 0 then change it.
TextureSetSize=-1 check this , if not set to -1 then change it
BitsPerPixel=32
TestedFullScreen=1
Height=1080
Width=1920
vSyncMode=0
MipMapLODBias=-0.50
BestStampVOffset=0.50
BestStampUOffset=0.50
UseStencilBuffer=0
MipFilter=2
MinFilter=2
MagFilter=2
Renderer=nvldumd.dll
Version=Product 26 Version 21.14 Build 4108
Vendor=NVIDIA GeForce GTX 1080