Windows 10 version 1809 has a security update, but you have to install it manually

Surface Pro 6 (Image credit: Daniel Rubino / Windows Central)

What you need to know

Windows 10 version 1809 has a new security update.
To receive the update, you have to install it manually.
Windows 10 version 1809 reached its end of support earlier this month.

The update has just a single highlight, which is outlined on a Microsoft support page:

Updates an issue that might cause Kerberos authentication and ticket renewal issues that are related to the implementation of CVE-2020-17049.

The update also includes a few improvements and fixes:

Addresses issues with Kerberos authentication related to the PerformTicketSignature registry subkey value in CVE-2020-17049, which was a part of the November 10, 2020 Windows update. The following issues might occur on writable and read-only domain controllers (DC):
Kerberos service tickets and ticket-granting tickets (TGT) might not renew for non-Windows Kerberos clients when PerformTicketSignature is set to 1 (the default).
Service for User (S4U) scenarios, such as scheduled tasks, clustering, and services for line-of-business applications, might fail for all clients when PerformTicketSignature is set to 0.
S4UProxy delegation fails during ticket referral in cross-domain scenarios if DCs in intermediate domains are inconsistently updated and PerformTicketSignature is set to 1.

As pointed out by Neowin, this build is not available through Windows Update. Instead, you have to manually install it through Microsoft Update Catalog.

Sean Endicott is a news writer and apps editor for Windows Central with 11+ years of experience. A Nottingham Trent journalism graduate, Sean has covered the industry’s arc from the Lumia era to the launch of Windows 11 and generative AI. Having started at Thrifter, he uses his expertise in price tracking to help readers find genuine hardware value.

Beyond tech news, Sean is a UK sports media pioneer. In 2017, he became one of the first to stream via smartphone and is an expert in AP Capture systems. A tech-forward coach, he was named 2024 BAFA Youth Coach of the Year. He is focused on using technology—from AI to Clipchamp—to gain a practical edge.