Get the latest Windows 10 Update
If you want to install the latest update now, select Start > Settings > Update & Security > Windows Update, and then select Check for updates. If updates are available, install them.
If the latest version (e.g. 21H2) isn't offered automatically through Check for updates, you can get it manually through the Windows Update Assistant (opens in a new window).
A page titled Download Windows 10 will open. Click on the blue button Update now
At the bottom left of your screen a small windows will appear as shown below:
Click on this window and follow the instructions.