i tried installing tensorflow using 'pip install tensorflow ' in anaconda prompt and command prompt. its showing following output
I was getting this error while installing from conda environment. Always upgrade conda or pip before a new installation.
Following worked for me:

[Optional] If installing in conda environment, then temporarily remove the conda env:
conda remove --name myenv --all
Update all conda packages:
conda update --all
Create conda env again:
conda create -n myenv
Activate conda env:
conda activate
Install tensorflow:
pip install tensorflow
Found existing installation: wrapt 1.10.11
Cannot uninstall 'wrapt'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.