For the outdated Windows 10, the first security update was released in 2026.

Users of outdated versions of Windows 10 have been urged to install the first update to the operating system in 2026. This was reported by PCWorld magazine.

We are talking about update KB5073724, which has become available for computers running Windows 10 21H2, Windows 10 Enterprise LTSC 2021 and Windows 10 22H2. To install it, registration in the ESU Advanced Updates program is required, since Microsoft has stopped releasing regular patches for this OS since October 14.

The article notes that the update does not contain any new features, but Microsoft recommended installing it as soon as possible. According to journalists, the package includes improvements related to the secure boot of the system.

In addition, Windows developers have excluded a number of outdated and potentially dangerous drivers from the system, including agrsm64.sys , agrsm.sys , smserl64.sys and smserial.sys . These components could pose a threat to device security.

At the time of the release of the material, Microsoft had not fixed any problems that could lead to failures when installing the KB5073724 update on users' computers, PCWorld writes.

On December 24, 2025, Galen Hunt, the company's lead engineer, announced Microsoft's plans to translate the code of software products into the Rust language. It was noted that the task will mainly be performed by artificial intelligence (AI) agents.

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