Windows 10 Anniversary Update is rolling out now; it will soon be available via the Windows Update feature, depending on your location.
If you cannot wait any more, use this link to visit the relevant Microsoft page and trigger the update manually.
Click on the “Get the Anniversary Update now” button and download a small setup file, which will guide you through the process.
Once run, a wizard will welcome you. Click Update Now as seen below to download Windows Anniversary Update.
When the wizard is done, you will be running Windows 10 Version 1607.