https://www.bleepingcomputer.com/news/microsoft/microsoft-released-windows-7-and-81-cumulative-updates-kb4345459-and-kb4345424/

If you’re still running Windows 7 or Windows 8.1, then it’s time to head to Microsoft's Update Catalog website to download new cumulative updates. The software maker quietly pushed out these updates for Windows 7 and 8.1 devices to address some persistent issues.

These two updates, called KB4345459 and KB4345424, are not available via Windows Update and can only be installed via a manual download of the package from the Microsoft Update Catalog website.