I want to install Theano but it doesn't work

I wrote pip install Theano and it marks this:

Collecting Theano  Using cached Theano-1.0.5.tar.gz (2.8 MB)  ERROR: Error [WinError 5] Access is denied while executing command python setup.py egg_info  Preparing metadata (setup.py) ... error  ERROR: Could not install packages due to an OSError: [WinError 5] Access is denied    Check the permissions.

I tried rewriting pip install Theano but it didn't work, I even rewrote all my code but it didn't work.