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Microsoft will end support in 2026 for Windows 11, Office 2021, and other key products. See what’s affected, key dates, and how to prepare.
Microsoft is lining up a major round of goodbyes in 2026, and the list touches some of its most widely used software.
From Windows 11 to Office 2021 and key developer tools, the company’s next end-of-support wave will affect everyday users, schools, and businesses alike. Below is a clear look at what’s ending, when it’s ending, and why it matters.
One of the biggest milestones in 2026 is the end of support for Windows 11 version 24H2.
According to Microsoft’s support documentation cited by Windows Latest, support for Windows 11 24H2 will end on Oct. 4, 2026. After that date, devices running this version will no longer receive security updates or bug fixes.
Windows 11 24H2 first arrived on Oct, 1, 2024, and was one of the platform’s largest feature updates. As with earlier Windows 11 releases, Microsoft plans to move users forward rather than keep older versions alive. Systems on 24H2 will be pushed toward newer releases, including Windows 11 25H2.
Microsoft has also confirmed that Windows 11 SE, its education-focused operating system, is nearing its final chapter.
Windows 11 SE was designed as a streamlined version of Windows for schools, positioned as an alternative to ChromeOS. However, adoption remained limited. Microsoft has confirmed that Windows 11 24H2 is now the last supported version for Windows 11 SE, with final updates arriving in October 2026.
Once support ends, schools still using Windows 11 SE will need to migrate devices to standard Windows editions or other platforms to avoid running unsupported software.
While consumer editions of Windows 11 23H2 already lost support in late 2025, enterprise customers get a bit more time.
Support for Windows 11 23H2 Enterprise, Education, and IoT Enterprise will officially end on Nov. 10, 2026. Once that date passes, Microsoft will stop releasing updates for those editions as well. For organizations still running these versions, 2026 becomes a hard deadline for upgrades.
The countdown is also on for Office 2021, Microsoft’s last major standalone Office release before Office 2024.
Office 2021 launched on Oct. 5, 2021, and Microsoft’s lifecycle policy sets its end-of-support date to Oct. 13, 2026. The same date applies to Office LTSC 2021 and Office LTSC 2021 for Mac, according to documents reviewed by Windows Latest.
After October 2026, Office 2021 apps will continue to run, but they will no longer receive security or quality updates. Users will need to choose between buying Office 2024, which is supported until 2029, or switching to a Microsoft 365 subscription.
The wave doesn’t stop there. Also finishing up in 2026 are Windows Server 2012 (Oct. 13), PowerShell 7.4 (Nov. 10), and developer tools like .NET 8 (Nov. 10) and .NET 9 (Nov. 10).
This 2026 support wave is more than a series of calendar dates. It marks the end of an era for how we interact with software. The idea of buying a program outright and using it securely for a decade is fading. Microsoft, like much of the tech industry, is steering everyone toward a model of continuous, connected updates.
It’s a transition that comes with growing pains, including concerns over access and control. As reported by WebProNews, Microsoft has already discontinued offline activation methods for Windows, meaning you now need an internet connection and often a Microsoft account just to get started. This move has sparked debate about privacy and accessibility for users in remote areas or secure facilities.
Whether this cloud-first, subscription-driven future is more convenient or simply more controlling depends on your perspective.
My advice is not to wait until the week of the deadline.
None of these products stop working overnight, but they do stop being protected. Knowing the dates now gives you time to move forward safely.
Also read: Microsoft will raise Microsoft 365 and Office 365 prices in July 2026 in a planned Office price hike.
Aminu Abdullahi is a B2C and B2B technology and finance writer with more than six years of experience covering enterprise IT, cybersecurity, cloud computing, artificial intelligence, fintech, business software, and emerging technologies. His work has appeared in publications including TechRepublic, eWEEK, Channel Insider, Geekflare, Enterprise Networking Planet, eSecurity Planet, CIO Insight, and Webopedia. With a technical background in computer science, he specializes in translating complex technology topics into clear, accessible content for business leaders and decision-makers.
