The Windows 10 Fall creators update is available now if you don't want to wait for the staged automated install .

For a single PC just go to the following web site and click "update now". If you have multiple PCs you can also create an install disk either on USB or ready to burn to DVD.

This will need to be done from an administrative account and I suggest you plan to let it run overnight. As always make sure you have good backups if you store data on the PC that's getting updated.