1c. Installing the Toolchain on Windows
Git for Windows provides a terminal application (Git BASH) and installs Git on your system so that you can clone from GitHub.
Make is included in the GNUWin32 package of tools. Download the Setup program for an installer.
Once this is installed, you will need to add the path to your environment variables.
Download and install the GNU Embedded Toolchain for Arm.
You may see a a download button on the right hand side which briefly appears when the page loads, and then quickly disappears. You can ignore that and scroll down until you see the Windows 32-bit Installer. That is the package that you want.
On the final screen of the installer, there is a checkbox for adding the path to your environment variables. It is unchecked by default.
Make sure to check this box if you don't want to add the path yourself:
If you did not tick the checkbox in the installer, you will need to add the path to your environment variables.
Download dfu-util.
Extract the folder and move it to a permanent location such as \User\Documents
Once this is installed, you will need to add the path to your environment variables.