There are alternate ways to get windows 10 anniversary update, but not all systems gets access to these updates. In spite of that i have found a very good alternative to get the anniversary update and enjoy it’s features.
You will have to download Windows 10 Upgrade Assistance from here.
Click on “Get Anniversary Update now Button” to download.
This will download a Windows 10 Upgrade EXE file. Run the executable to start the Windows 10 Update Assistant. When you click Update Now the tool will check your system for compatibility. Should your system be compatible, waiting for the timer to finish its countdown or clicking Next will initiate the update.
Once the download has finished, click Restart now to start the installation.