I had a similar problem and I did something like the below mentioned steps with my Path environment variable to fix the problem
Located where my Anaconda3 was installed. I run Windows 7. Mine is located at C:\ProgramData\Anaconda3.
Open Control Panel - System - Advanced System Settings, under Advanced tab click on Environment Variables.
Under System Variables, located "Path" add the following: C:\ProgramData\Anaconda3\Scripts;C:\ProgramData\Anaconda3\;
Save and open new terminal. type in "conda". It worked for me.
Hope these steps help