An elevation of privilege vulnerability exists in Windows 10, version 1809 when the system is installed from physical media (USB, DVD, and so on) by having the keep nothing option selected.
To learn more about the vulnerability, see CVE-2018-8592.
How to obtain and install the update
Method 1: Windows Update
This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically if it is applicable to your computer. For more information about how to turn on automatic updating, see Windows Update: FAQ.
Method 2: Microsoft Update Catalog
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.
If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
How to obtain help and support for this security update
Help for installing updates: Protect yourself online
Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure
Local support according to your country: International Support