The easiest way to find out if the 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 Creators Update is installed you should see Version 1703 (OS Build 15063.0) 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: