Microsoft has released Windows 10 Anniversary update last night to public. As it is rolling out in stages, it might take days to get to your device.
As discussed earlier in the following post, you can download the ISO from here if you do not want to wait:

Here is how to update to Windows 10 Anniversary update manually if Windows update doesn’t find it

To simplify this process, MS has released a page to download Windows 10 ISO that would bypass using Media creation Tool. Navigate to this page:

Download Windows 10 build 14393 official ISO files 

Download the ISO files from here and run a repair Install.Also, if you want you can download the ISO to keep it for future use as well.

Download steps

1. Navigate to the Page above and select your edition.For Windows 10 home and pro, select Windows 10.
2. Select the language according to your existing system.
3. Choose 32 bit/64 bit language. 

The ISO is around 2.5 GB for 32 bit and 4 GB for 64 bit system.

Go over and download the ISO!