The November 2026 security update is the last one for 23H2 Enterprise, Education and IoT Enterprise. Here's how the jump to 26H2 works.
Windows 11 version 23H2 is nearly done. Microsoft says the November 2026 security update is the last one for the Enterprise, Education and IoT Enterprise editions. Home and Pro already lost support in November 2025.
After the cutoff, PCs keep working but stop getting fixes for new security holes, which makes them easier targets for attacks. Microsoft recommends moving to Windows 11 26H2, released in September 2026.
26H2 arrives as a tiny enablement package on PCs running 24H2 or 25H2, but 23H2 machines don't have the hidden code, so expect a bigger download and a longer install. Plan it before the November deadline.
If your work laptop or school PC still runs Windows 11 version 23H2, it has one security update left. Microsoft says the November 2026 update will be the last for the Enterprise, Education and IoT Enterprise editions of 23H2. After that, no more fixes for newly discovered security holes.
That matters even if you never think about Windows versions. Schools, offices, shops and kiosks often run these editions, and an unpatched PC is an easy way in for ransomware and other attacks. If you look after any of these machines, the window to plan the upgrade to Windows 11 26H2 is now a few weeks long. And the move from 23H2 isn’t quite the one-click switch Microsoft describes for newer PCs.
Microsoft is retiring 23H2 in two stages:
In a message center update, Microsoft said devices on these editions will stop getting the monthly patches that protect them from the latest threats, and advised updating eligible devices to a supported version of Windows 11.
Your PC won’t stop working after the deadline. It will boot, run apps and connect to the internet as usual. It just won’t get fixes for new security flaws, which gets riskier every month.
Windows 11 26H2, also called the Windows 11 2026 Update, arrived in September 2026. The name means second half of 2026. It isn’t packed with headline features, because Microsoft has been shipping new tools such as Point-in-Time Restore and Cloud Rebuild through regular updates during the year instead of saving them.
One genuinely new addition is automatic cloud backup of Windows settings, your Microsoft Store app list and some personal files. It’s on by default, but you can turn it off.
The main reason to upgrade is time. Moving to 26H2 restarts your support clock. Reports put the end of support for 26H2 Home and Pro at October 2028, while another lists October 2029 for consumers, so check Microsoft’s lifecycle page for your edition’s exact date. Either way, it’s years more protection than 23H2 has left.
Microsoft delivered 26H2 as an enablement package, or eKB. That’s a tiny file, expected to be just 174 KB, that switches on features already hidden inside Windows. The catch is that the dormant code ships only in Windows 11 24H2 and 25H2. A PC still on 23H2 doesn’t have it, so expect a bigger download and a longer install than the quick single-restart switch newer machines get.
For a single PC, the steps are simple:
Not sure what you’re running? Press the Windows key, type winver and press Enter. A box shows your version number.
On managed work or school PCs, you may not see the option at all, because IT controls updates. In that case, ask your IT team when the upgrade is scheduled.
If you manage a fleet, the next few weeks are your testing window. Start with the machines that hold sensitive data or face the internet, and try key business apps, printers and other peripherals on 26H2 before a wide rollout.
Watch for two side issues:
Microsoft has also warned that once it rotates its Windows Update certificates next year, PCs on unsupported versions won’t get security patches at all, another reason not to let old machines drift.
For most employees and students, there’s nothing to do except accept the update when it arrives and restart when asked. Save your work first, since the upgrade from 23H2 takes longer than a normal monthly patch.
If you’re a small business owner or teacher who manages your own Windows 11 Education or Enterprise machines without an IT department, put the upgrade on your calendar now. Waiting past the last November patch leaves those PCs exposed to any flaw discovered after it.
Still on Windows 10 at home? That’s a separate deadline. Microsoft extended free Windows 10 Extended Security Updates for home users to October 2027.
The Education, Enterprise and IoT Enterprise editions get their final security update in November 2026. Home and Pro ended in November 2025.
Yes. Microsoft recommends moving 23H2 devices to a supported version, and 26H2 is the newest. Expect a fuller upgrade than the tiny package used on 24H2 and 25H2 PCs.
Reports point to October 2028 for Home and Pro, with one listing October 2029. Check Microsoft’s lifecycle page for your edition.
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