First open a powershell terminal install the scoop package manager:
iex (new-object net.webclient).downloadstring('https://get.scoop.sh')
Note: if you get an error you might need to change the execution policy (i.e. enable Powershell) with:
Set-ExecutionPolicy RemoteSigned -scope CurrentUser
Then add the extras
bucket:
scoop bucket add extras
and install nteract:
scoop install nteract
scoop bucket add versions
scoop install python27
scoop install python
pip install opencv-python opencv-contrib-python numpy matplotlib
python -m pip install ipykernel
python -m ipykernel install --user
scoop reset python27
scoop reset python