Here's how you can manually get the Windows 10 Anniversary Update:
1. Go to Settings > Updates & Security > Windows Update
2. In Windows Update simply click 'Check for Updates'.
3. The Anniversary Update will appear as, 'Feature update to Windows 10, version 1607'. Click update and the update will begin downloading and installing.
Another way to get the Windows 10 Anniversary Update will be by clicking “Learn more” just below the “Looking for info on the latest updates?" In Windows Update.
From there you’ll be taken to a support page on Microsoft.com that will allow you to download the ISO file to your PC.
Tip! To find the latest updates about Windows, just visit their Facebook page or follow them on Twitter @Windows.