Microsoft Just Quietly Set the Deadline to Lock Your Office Apps. It’s Worse Than You Think.
Editor's Note: This article has been updated to reflect the passing of the end-of-life date for Windows 10 and its impact on Microsoft 365/Office 365 application support.
The previous version contained inaccuracies regarding the January 1, 2024 deadline.
With Windows 10's end of life having passed on October 14, 2025, a significant change came to how Microsoft 365 and Office 365 applications function on that operating system.
While previously fully supported, users continuing to run Windows 10, or those already on unsupported Windows versions like Windows 7 or 8.1, are finding their Microsoft 365 and Office 365 apps essentially "locked" – unable to receive critical security updates, feature enhancements, or even basic bug fixes.
This move highlighted Microsoft's ongoing push to transition its user base to newer, more secure platforms.
The Passed Deadline: October 14, 2025
While Microsoft 365 and Office 365 applications were fully supported on Windows 10, this changed once Windows 10 reached its end of extended support on October 14, 2025.
After this date, these applications officially ceased receiving security updates, non-security updates, and paid support on Windows 10.
This move was designed to encourage users onto Windows 11 to maintain a secure and functional Office environment.
This wasn't a sudden, arbitrary decision. Microsoft has a consistent lifecycle policy for its products, and Windows 10's end-of-life had been communicated for some time.
However, the direct implication for widely used productivity suites like Microsoft 365 often caught users by surprise.
The transition impacts millions of users still relying on Windows 10 for their daily productivity.
What This Means for You
Update Cessation for Windows 10 Users
If you were still on Windows 10, your Microsoft 365/Office 365 apps continued to receive updates until the operating system reached its end of life.
However, after October 14, 2025, if you continued to use Windows 10, your Office apps became static on that OS.
This means no new features, no bug fixes, and crucially, no security patches beyond that date.
This can lead to compatibility issues with newer file formats, reduced functionality, and increased vulnerability to cyber threats.
Upgrades to Windows 11
To keep your Microsoft 365 suite up-to-date and secure on a supported operating system, an upgrade to Windows 11 became necessary after Windows 10's end-of-life.
This ensures you continue to benefit from the latest innovations, performance improvements, and robust security features integrated into both the OS and the Office applications.
The End of Office 2019 and Older
While the focus here is on Microsoft 365's future support on Windows 10, it’s also important to remember the lifecycle of perpetual license versions of Office.
Office 2019 reached its end of mainstream support on October 10, 2023, and reached its end of extended support on October 14, 2025.
This means that users of Office 2019 also ceased receiving security updates and paid support after that date.
Older versions like Office 2013 were already unsupported, while Office 2016 joined Office 2019 in losing support on that same October 2025 date.
The Drive to Windows 11
Microsoft’s strategy has been clear: accelerate adoption of Windows 11.
By aligning Office app support with the Windows lifecycle, the company created a strong incentive for users to migrate to its latest operating system.
This consolidation has allowed Microsoft to streamline development, focus resources on a unified platform, and enhance security across its ecosystem.
Many PC users still relied on Windows 10.
This strategic move was designed to nudge that large user base towards Windows 11, which offers tighter security, a refreshed user interface, and deeper integration with Microsoft's cloud services.
What Are Your Options?
Upgrade to Windows 11
This is Microsoft’s preferred solution.
If your current PC meets the Windows 11 system requirements, upgrading is generally straightforward and ensures continued support for your Office applications.
Purchase a New PC
Many older machines aren’t compatible with Windows 11’s stringent hardware requirements.
If your PC lacks a TPM 2.0 chip or a sufficiently modern CPU, a new machine is your only path forward for a fully supported ecosystem.
Consider Linux or Mac
If you're unwilling to upgrade your Windows OS or hardware, open-source alternatives like LibreOffice or Apple's iWork suite offer compatibility with Office file formats, though they may not provide identical functionality or a seamless transition for complex documents.
Stick with Unsupported Software
You could continue using your Microsoft 365 apps on Windows 10 up until its end of life.
Now, past October 14, 2025, if you choose to continue using Windows 10, your Office apps are no longer receiving updates.
Without security updates, your data and system remain vulnerable to new exploits, making this a risky long-term solution.
The Bottom Line
The passing of the October 14, 2025, deadline for Windows 10 marked a significant shift in Microsoft’s product lifecycle strategy.
While Windows 10 users previously had time, the company clearly set expectations for future compatibility and support.
For millions of Windows 10 users, this date meant a forced decision: upgrade, replace hardware, or risk using increasingly vulnerable software now that Windows 10 is no longer supported.
Staying informed and taking action is crucial to ensure your productivity and security remain uncompromised.
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