The easiest way to find out if the Fall Creators Update is installed is to check the OS Version and Build. And here is how.
Perform the following steps
- Press Win+R.
- Type winver.
- Hit Enter:
If Windows 10 Fall Creators Update is installed on your system you should see Version 1709 (OS Build 16299.15) or greater.
If you are running Windows 10 Creators Update released in spring 2017 you should see Version 1703 (OS Build 15063.632) or greater:
This is the example of an older build and version. I had Version 1607 (OS Build 14393.969) right before installing the update: