How to get Docker installed in your windows? First major consideration is the version of Windows that you are running.
Docker for Windows: Docker for Windows requires 64 bit Windows 10 Pro or Windows Server 2016 and Microsoft Hyper-V. You can find complete requirements here
Docker Toolbox : If your windows does not meet the above requirements, you can install Docker Toolbox, which uses Oracle Virtual Box
Let us look at Docker toolbox installation in detail for those who are on Windows 8 or Windows 7. Make sure that virtualization is supported/enabled in your OS. For Windows 8, verify that from Task Manager -> Performance Tab.
For windows 7, download and run the Hardware-Assisted Virtualization Detection Tool
Next install Docker Toolbox (with default options selected) and launch Docker Terminal
Verify installation by running hello-world command
$ docker run hello-world
Launch Kitematic to search for various docker images available from Docker Hub