1- Type update in the search bar in the bottom left hand corner of your screen.
2- Click on Check for updates
3- Click Check for updates
NOTE: It may take a few minutes for the updates to be installed. Then it may prompt you to restart your computer. Make sure that your computer is plugged into a power supply (charging cord) the entire time the restart is happening. Click the Restart now button when you are ready. It may take a long time depending on the update.