Before Installation
As a beginner this part can easily be overlooked but it is an important step. There are some system requirements before installing Docker, in this case, on Windows OS and here is a guide on what to do before installation.

• Check the Windows version that you are using.
  The latest Docker version runs on Windows 10 64-bit: Pro, Enterprise, or Education (Build 16299 or later).
  There is also a Docker package for Windows 10 Home.

• Check the RAM size. Another system requirement is 4GB system RAM.

Below are the rest of the system requirements;

• Hyper-V and Containers Windows features must be enabled.
• BIOS-level hardware virtualization support must be enabled in the BIOS settings. After confirming this, you can also have a look at the product manual and then download and install Docker.

Confirming installation
Open the terminal and type the following.

docker -v

You should see a docker version. If you don't see a Docker version, reinstall or restart your machine.