Unfortunately it means you MUST install the Fall Creator's Update, which, given the headaches the first Creator's Update has caused some people, means these changes may take a year to make it to some people's systems. Why Microsoft couldn't introduce these changes in the monthly features update is questionable.
In a recent post, Microsoft claimed that it has been working closely with antivirus partners such as Kaspersky, and the recent discussions it has been having with them has led to some changes that will be implemented in the Windows 10 Fall Creators’ Update.
One of the changes includes working more closely with third-party antivirus companies to make their software compatible with the latest Windows update. Microsoft said that Windows customers should expect that the compatibility issues for their preferred third-party antivirus software should be resolved before receiving a new Windows update.
Microsoft will also increase the time its antivirus partners will have to review a new Windows update before it’s rolled out to users.
The company will also allow antivirus vendors to set their own notifications for subscription expiration, which should increase the antivirus vendors’ revenues.
Microsoft said it has also changed how users will be warned when an antivirus program has expired and no longer protects them. Until now, Windows would show a warning only once, which users could easily ignore. Starting with the Windows 10 Fall Creators’ Update, the warning will persist until users decide whether to renew their third-party antivirus subscription or stick to the free Windows Defender.