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Windows 10 End of Life Has Arrived. What It Means for Your Business Now
Windows 10 reached end of life on October 14, 2025. That date has passed. If your business still has machines running Windows 10 without extended security updates, they have been unpatched for the better part of a year, and every month widens the gap between the flaws attackers know about and the fixes you are not receiving.
This article was originally published before the deadline. We have updated it because the situation in 2026 is different, and in one specific way, more urgent than it was before the cutoff.
Why an Unsupported Operating System Is a Business Problem
Once an operating system stops receiving security patches, every newly discovered flaw stays open forever. Attackers know exactly which systems fall into that category, and they aim at them first, because the work is already done.
- Security: new vulnerabilities in Windows 10 are found regularly. On a supported system they get patched within weeks. On yours, they do not get patched at all.
- Compatibility: software vendors are already dropping Windows 10 support. Browsers, line-of-business applications, and security tools will follow.
- Compliance: frameworks such as HIPAA and the FTC Safeguards Rule expect supported, patched software. An end-of-life operating system is an automatic finding in any audit.
Pull out your cyber liability insurance application. Somewhere in it, you attested that you keep software current and supported. A claim filed from a network of unsupported Windows 10 machines gives your insurer a documented reason to deny it, after the incident, when it is too late to fix.
Still on Windows 10? You Are in One of Two Situations
You bought Extended Security Updates. Microsoft sells ESU as a bridge: security patches only, no fixes, no features. For businesses, the price roughly doubles every year, by design, to push you off the platform, and the program ends entirely in October 2028. The consumer version ends October 13, 2026, a few weeks from when this update was written. ESU is a reasonable bridge while replacements are ordered and scheduled. It is not a plan.
You did nothing. Machines on the network, unpatched since October 2025. This is the situation to get out of this quarter, not next year. It is also worth checking rather than assuming: we routinely find “one or two” leftover Windows 10 machines that turn out to be five or six once someone actually looks.
The Way Out, by Age of Machine
- Upgrade to Windows 11, free, if the hardware supports it.
- Machines under about 3 years old usually qualify. The upgrade can be pushed overnight with no manual work at each desk.
- Test your critical applications first. The common failure is not the operating system, it is the fifteen-year-old label printer driver nobody thought about.
- Replace the machine if it is 4 to 5 years old or fails the Windows 11 hardware check.
- A machine that cannot run a supported operating system is an unpatchable liability with a power cord. Its replacement was already overdue on the normal hardware lifecycle.
- Plan the spend deliberately: stagger replacements, or bundle them into a managed onboarding where the project is priced once, in writing.
- Buy ESU only as a scheduling bridge, with a purchase order for the replacements already signed.
Where We Fit
Sorting this out is standard work inside a Sentry Inspect assessment: we inventory every device, flag what is unsupported or about to be, and hand you a sequenced replacement plan with real prices. If you already know you have a Windows 10 problem and just want it gone, book fifteen minutes and we will tell you what it takes.
