Sure, here are the steps on how to install a new version of Python 3 on Windows:

1. Go to the Python website: https://www.python.org/downloads/.
2. Click on the "Windows" tab.
3. Under the "Windows installers" section, click on the "Download Python 3.11.x (x86-64 executable installer)" button.
4. Once the download is complete, run the installer.
5. Follow the on-screen instructions to complete the installation.

Once the installation is complete, you can verify that Python 3 has been installed by opening a command prompt and typing the following command:

python3 --version

You should see the following output:

Python 3.11.x

To install a specific version of Python 3, you can use the following command:

python3 -m pip install --user --upgrade python==3.11.x

For example, to install Python 3.10, you would use the following command:

python3 -m pip install --user --upgrade python==3.10

To switch between Python 3 versions, you can use the following command:

py -3.11

This will start a Python 3.11 interpreter.

To install Python 3 from the Microsoft Store, you can use the following steps:

1. Open the Microsoft Store app.
2. Search for "Python".
3. Click on the "Python 3" app.
4. Click on the "Install" button.

Once the installation is complete, you can verify that Python 3 has been installed by opening a command prompt and typing the following command:

python --version

You should see the following output:

Python 3.11.x