For customers running the November update (1511) which was released in 2015, or the Anniversary Update, which was released July 2016, Microsoft will begin showing a popup that will remind you to review your privacy settings. Microsoft will give you up to five opportunities to postpone this process, after which it will ask you to confirm your privacy settings.
After that point, Microsoft will implore you to upgrade to the Windows 10 Creators Update, but it will give you the choice to determine when the procedure actually takes place.
If you’re running the original version of Windows 10 (1507), which was released in July 2015, Microsoft will take additional steps to ensure that customers upgrade. Build 1507 has reached end-of-life status, which means that it is no longer eligible to receive monthly security updates. This puts customers at risk from new malware threats, which is why Microsoft wants to make sure that these customers upgrade to the Creators Update as soon as possible.
Microsoft provides the following guidance with regards to build 1507:
If you're currently running Windows 10 version 1507, you’ll receive a notification that your device needs the latest security updates and will attempt to update your device… To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10.
Here’s the bottom line: if you’re not running the Windows 10 Creators Update, be prepared to hear a lot from Microsoft over the coming days, weeks and months. Looking to the future, Microsoft is focusing on the Windows 10 Fall Creators Update, which will take additional steps toward improving the security of its most prominent operating system.