I installed Anaconda 64 python 2.7 on Windows 7 64-bit version. After installation, the anaconda prompt can start with no problem. But whenever I restart/shutdown and restart th
What worked for me with the same error.
Create another system variable P1 with the variable value being the location of where your Anaconda install is (mine is here):
C:\Program Files (x86)\Anaconda3\
In your PATH variable, put these two at the front:
%P1%\envs;%P1%\Scripts\;everything_else_here
Restart command prompt and try to activate env again.