I often found that "spyder" was unstable and didn't start, but it seems that Spyder's instability is related to the Python version, the Tensorflow version, and the Spyder version. I have come to understand that. When I created a conda environment with python3.7 and installed Tensorflow-gpu = 1.15, spyder did not start. (Translated by Google Translate)
Spyder version or Anaconda version
File "C:\Users\Ovidio.spyder-py3\temp.py", line 26, in <module>
from tkinter import *
File "C:\Program Files\Spyder\pkgs\tkinter__init__.py", line 36, in <module>
import _tkinter # If this fails your Python may not be configured for Tk
ImportError: DLL load failed: No se puede encontrar el módulo especificado.