After you start the Far cry new dawn game. open options then go to video and set the video to the default settings This should fix it But if it don't fix it your video card may be to slow to run it.
Here are the Far Cry New Dawn System Requirements (Minimum)
CPU: Intel Core i5-2400 | AMD FX-6350 @ 3.9 GHz.
CPU SPEED: Info.
RAM: 8 GB.
OS: Windows 7 SP1, Windows 8.1, Windows 10 (64-bit versions only)
VIDEO CARD: NVIDIA GeForce GTX 670 | AMD R9 270 (2GB VRAM with Shader Model 5.0 or better)
PIXEL SHADER: 5.0.

