First, a break down:
What is Nahimic?
Nahimic is an audio enhancement software designed to improve the sound quality of your computer. It is often shipped with newer Desktops and Laptops of most major brands (my computer is a Lenovo and I had to remove it).
How does it affect Gaea?
It can prevent the 3D viewport from launching successfully and force Gaea into a 2D-only view.
In almost every circumstance, this software can be uninstalled safely from your computer.
See the Documentation for additional reference: