How to install Windows 10 anniversary edition?

[NexT_Zenki]

I am trying to get my forza horizon 3 to install on my PC but you have to have the anniversary edition windows 10.
My question is how do a go back to the older version of windows 10 to install the game?

[ManteoMax]

@ManteoMax

FH3 FAQ: PC information

Will my PC be able to play FH3?
See discussion thread. The Gone Gold announcement lists the following recommended specs:

• CPU i7 3820 @ 3.6GHz
• GPU NVIDIA GTX 970 or NVIDIA GTX 1060 or AMD R9 290X or AMD RX 480
• VRAM 4GB
• RAM 12GB
• Hard Drive Type HDD
• Available Space 55 GB
• Resolution 1920 x 1080
• Windows Version Windows Anniversary Edition 64-bit 14393.101 The Microsoft.com Windows Store link also shows Minimum requirements of 8GB memory, 2GB video memory, i5 3570 processor, and NVIDIA GTX 750 Ti or AMD R7 250X, and will show your currently installed processor:
  Ideal specs are i7 6700 @ 4.0GHz, GTX 980Ti or GTX 1080 or R9 Fury X, 6GB VRAM, 16GB RAM, SSD w/55GB free, 3840 x 2160 resolution.

Windows Anniversary Update note
The most recent build of Windows 10 and DirectX 12 is required to install and play FH3 on PC. Run dxdiag from Cortana to confirm your current builds. Under Settings > Updates & Security you may see “Your device is up to date” even if you don’t have the Anniversary Update installed. Click the “Learn more” link to load the support page and then click “Get the Anniversary Update now” to install it.