Go to https://zoom.us/download and use the Zoom Client for Meetings download button to start your download.
Click the ZoomInstaller.exe in your downloads bar and the installer will begin running.
Follow the prompts and finish your installation. The program should open automatically. If not, click the magnifying glass in the bottom left of your screen to search for Zoom.
Sign in using your NMIT account (firstname.lastname@nmit.ac.nz) and the password you have set online.
Note: Your Zoom password will not change when you update your regular NMIT login.