Windows 10 KB5073724 January 2026 Patch Tuesday update is out

It is the second Tuesday of the month, which means one thing: Patch Tuesday updates. Users with PCs enrolled in the Extended Security Updates program can download KB5073724 with build numbers 19045.6575 and 19044.6575. In addition to traditional security fixes that make Patch Tuesday updates mandatory, today's updates include the following fixes and changes:

• [Drivers] This update removes the following modem drivers: agrsm64.sys (x64), agrsm.sys (x86), smserl64.sys (x64) and smserial.sys (x86). Modem hardware dependent on these specific drivers will no longer work in Windows.
• [Secure Boot] Starting with this update, Windows quality updates include a subset of high-confidence device targeting data that identifies devices eligible to automatically receive new Secure Boot certificates. Devices will receive the new certificates only after demonstrating sufficient successful update signals, ensuring a safe and phased deployment.
• [WinSqlite3.dll] Fixed: The Windows core component, WinSqlite3.dll, has been updated. Previously, some security software might have detected this component as vulnerable.

You can find the support document for KB5073724 here. Microsoft says there are no known issues in today's update.

As usual, your PC will install Patch Tuesday updates automatically in the background, but you can speed things up by heading to Settings > Windows Update. Alternatively, KB5073724 is available for manual installation in the Microsoft Update Catalog.

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Posted Wednesday 14 January 2026 at 12:06 pm AEST (my time).

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