Anniversary Update for Windows 10 will be automatically downloaded on your Windows 10. But if you can’t wait to explore the new features in Anniversary Update, you can manually check for updates by navigating to Settings > Update & security > Windows Update to download and install Anniversary Update.
In addition to Windows Update, users can also use Windows 10 Media Creation Tool to download and install Anniversary Update. The Media Creation Tool can also be used download Windows 10 with Anniversary Update ISO.
Download Windows 10 with Anniversary Update ISO from Microsoft using direct download links
But if you’re not interested in using the Media Creation Tool to download Windows 10 with Anniversary Update ISO, there is an easy way to download Anniversary Update ISO.Step 1: Visit this page of Microsoft in your Edge browser.
Step 2: Under Select edition section, select your edition of Windows 10. Note that the Windows 10 includes both Home and Pro editions. When you install Windows 10 using the ISO, the right edition will be installed.
Click Confirm button after selecting the edition you want to download.
Step 3: When you are asked to select the product language, select the language and then click Confirm button.
Step 4: Finally, click on either 32-bit Download or 64-bit Download button to begin downloading Windows 10 with Anniversary Update ISO from Microsoft servers.
Note that the created links are valid for 24 hours from the time of creation.
Source: http://www.intowindows.com/windows-10-anniversary-update-1607-direct-download-links/