Windows 10 End of Support: What SMBs Must Do Now

Microsoft stopped supporting Windows 10 on October 14, 2025. If your business still runs it, those PCs no longer get security patches, so every vulnerability found after that date stays open on your machines for good. For most small businesses the fix is simple: upgrade eligible computers to Windows 11 for free, replace the ones that can't run it, and use Extended Security Updates only as a short bridge for stragglers. The expensive choice is doing nothing.

By The NetSys Group Team. The NetSys Group has delivered managed IT, cybersecurity, and cloud services since 1998. Our engineers hold degrees in electrical and computer engineering and are certified Microsoft and Cisco instructors, serving businesses across NY, NJ, CT, PA, and Southwest Florida.

What does "end of support" actually mean?

End of support means Microsoft no longer ships security updates, feature updates, or technical help for Windows 10. The machines still boot and run fine. The catch is that any flaw discovered from October 15, 2025 onward never gets patched, so an unsupported PC turns into a permanent open door that attackers already know how to walk through.

Microsoft states this plainly on its Windows 10 end-of-support notice: after that date, computers still function, but there is no more technical support, no software updates, and no security updates or fixes.

Is an unsupported Windows 10 PC really a security risk?

Yes, and the risk grows every month. Attackers watch for newly disclosed vulnerabilities and go straight for systems that will never be patched. An old operating system also creates problems beyond malware. Many cyber insurance policies now require supported, patched software, and running end-of-life systems can jeopardize a claim or a renewal, a point we cover in our guide to cyber insurance requirements for 2026. Compliance frameworks in finance, healthcare, and law treat unsupported software as a control gap you have to explain.

If you want to shore up the rest of your defenses at the same time, our rundown of the controls that actually stop attacks pairs well with an operating system refresh.

Can I upgrade to Windows 11 for free?

Often, yes. Eligible PCs running Windows 10 version 22H2 that meet the minimum hardware requirements can upgrade to Windows 11 at no cost. To check, go to Start > Settings > Update & Security > Windows Update and select Check for updates. If the machine qualifies, the upgrade is offered there.

The hardware bar is where a lot of small businesses get stuck. Windows 11 requires features like TPM 2.0 and a supported processor, and plenty of computers bought five or more years ago fall short. That is not a reason to panic. It is a reason to inventory what you own before you buy anything.

What if my computers can't run Windows 11?

You have two real options. The clean one is to replace the hardware, which also solves the slow-machine complaints that pile up on aging PCs. The bridge option is Microsoft's consumer Extended Security Updates (ESU) program, which can keep a Windows 10 device receiving critical security patches until October 12, 2027. Treat ESU as a runway, not a destination. It buys time to budget and phase in replacements, and then it ends.

For a fleet of machines, the smarter money is usually a planned refresh spread over a quarter or two rather than a single painful purchase or an indefinite reliance on paid extensions.

How should a small business plan the rollout?

Start with an inventory: which PCs are eligible for the free upgrade, which need ESU as a stopgap, and which should be replaced. Then sequence the work so the highest-risk machines, the ones handling email, finance, and client data, move first. Back up every device before you touch it, migrate files and settings deliberately, and schedule the cutover outside business hours so nobody loses a workday. This is exactly the kind of project a managed IT partner handles end to end, from procurement to data migration to disposal of the old drives. See how we approach it on our managed IT services page, and if you are budgeting, our breakdown of what managed IT actually costs per user will help you plan the number.

Frequently asked questions

Can I keep using Windows 10 after October 2025?

The computer will still turn on and run your software. What you lose is protection: no more security updates means known vulnerabilities stay open permanently. For anything touching customer data, email, or payments, running unsupported Windows 10 without ESU is a serious and growing risk.

How long does Extended Security Updates last?

Microsoft's consumer ESU program can protect a Windows 10 device with critical security patches until October 12, 2027. It is meant as a temporary bridge while you upgrade or replace machines, not a long-term way to avoid moving to Windows 11.

Will upgrading to Windows 11 slow down my old PC?

If a PC only barely meets the Windows 11 requirements, it may not feel faster. Machines that fail the requirements outright can't upgrade at all. In both cases, replacing genuinely old hardware usually gives a bigger day-to-day speed improvement than the operating system change itself.

Do I lose my files when I upgrade?

A properly run in-place upgrade keeps your files and applications. That said, you should never start without a verified backup. Hardware can fail mid-upgrade, and a good backup turns a worst-case scenario into an inconvenience instead of a data loss.

Still running Windows 10 across some or all of your business? Contact The NetSys Group for a complimentary risk assessment. We'll inventory your machines, tell you which qualify for the free upgrade, and lay out a replacement plan that fits your budget and your calendar.