From the Microsoft ISO site, you can choose the Edition that matches your current Windows 10 version and then select your language. Please make sure you get the right edition otherwise you would need to purchase the appropriate license. To verify, go to Settings > System > About and look under Edition.
The other ways you can update your Windows 10 PC to the Anniversary Update include:
- Windows Update – Over-the-air standard update
- Media Creation Tool – Lets you create an ISO or upgrade your current PC while keeping your files
- Refresh Windows Tool – Installs a clean version of the Windows 10 Anniversary Update with no bloatware, but does erase your contents
Most people will be okay using Windows Update, but the other options are good for those with many PCs,
computers that don’t have the update yet, or those looking to start fresh and wiped their computer.
The ISO files should be around 3.5GB in size.