I have just installed Anaconda 5.3 64-bit (Anaconda3-5.3.0-Windows-x86_64) on Windows 10 and am getting this error when trying to run Spyder.
pythonw.exe
Following @Azrael_DD's solution to downgrade to anaconda v5.2.0, you can also do it through a normal console:
conda install anaconda=5.2.0