There's a change coming to every Windows device in your business, and most IT teams either don't know about it yet or have put it on the "we'll deal with it later" list.

Later is now.

Microsoft has issued a clear warning: the Secure Boot certificates that have protected Windows devices since 2011 are expiring, with the first certificates lapsing in June 2026. For businesses running older hardware or devices still on Windows 10 without proper updates, this isn't a minor IT housekeeping task. It's a security exposure that grows every day you leave it unaddressed.

Here's what's actually happening, why it matters to your business, and what a sensible response looks like.

What Is Secure Boot, and Why Should a Business Leader Care?

You don't need to understand the technical details, but you do need to understand the risk.

Secure Boot is a security layer that works before Windows even loads. Every time one of your devices starts up, Secure Boot verifies that the software powering that startup process hasn't been tampered with. It's the mechanism that prevents a category of attack called boot-level malware, the kind that sits beneath your antivirus and endpoint tools and can compromise a machine before any of your defenses are active.

The certificates that make Secure Boot work, originally issued in 2011, are reaching their expiry date. Microsoft has been rolling out replacement 2023 certificates through Windows Update. For devices that receive them, the transition is largely automatic. For devices that don't, the protection slowly degrades.

The concern for businesses is not that your devices will suddenly stop working on June 24, 2026. They won't. The concern is that devices missing the updated certificates will lose the ability to receive future security protections for the boot process, including fixes for newly discovered vulnerabilities. As Microsoft describes it, those devices enter a "degraded security state." Over time, that gap widens.

Which Devices Are at Risk in Your Business?

This is where the picture gets more complicated for many organizations in Lebanon and Saudi Arabia.

Devices running Windows 10 without Extended Security Updates

Microsoft ended standard support for Windows 10 in October 2025. Devices on Windows 10 that are not enrolled in Microsoft's Extended Security Updates (ESU) program will not receive the new Secure Boot certificates through normal channels. That means they are now carrying two compounding risks: a no-longer-supported operating system, and a boot-level security layer that will stop receiving updates from June 2026.

Research from Omdia found that 18% of business customers plan to continue running Windows 10 after end of support with no defined migration path. In emerging markets, Windows 11 uptake lags 15 to 20 percentage points behind Western markets due to hardware constraints and legacy systems. If your business falls into this category, you are not alone, but you are exposed.

Devices that have missed Windows Updates

Even Windows 11 devices are not automatically safe. If a device has been powered off for extended periods, update policies have been paused, or update management has been inconsistent, it may not have received the replacement certificates yet. The transition requires coordination between Microsoft, your device manufacturer's firmware, and your endpoint management process.

Older hardware that cannot run Windows 11

Windows 11 requires TPM 2.0, a hardware component that many older but otherwise functional devices do not have. A business running a mixed fleet of older machines that cannot be upgraded to Windows 11 and are not on ESU faces a clear choice: enroll in ESU immediately, replace the hardware, or accept the growing exposure.

What Happens If You Do Nothing?

Your devices will still start. Your team will still be able to work. But the security foundation under those devices starts to erode in ways that aren't immediately visible.

Boot-level attacks are particularly dangerous because they operate below the layers your security tools monitor. An attacker who gains access at the boot level can persist through operating system reinstalls and evade endpoint detection tools entirely. The BlackLotus bootkit, which Microsoft specifically references in its Secure Boot guidance, demonstrated exactly this kind of attack in 2023. The updated certificates are part of Microsoft's response to that threat category.

For businesses in regulated industries, financial services, healthcare, legal, or government contracting, the compliance implications add another layer of risk. Running devices in a known degraded security state is increasingly difficult to justify under audit or when reporting to insurers.

The other risk is operational. A device that misses the firmware coordination required for the certificate update could, under certain conditions, experience boot failures after the deadline. For a single laptop, that's an inconvenience. Across a fleet of 50 or 100 devices, discovered after the fact, it becomes a serious operational problem.

What a Sensible Business Response Looks Like

This is not a crisis requiring panic. It is a deadline requiring action. The difference between those two things is preparation.

Step 1: Know what you have

You cannot protect what you cannot see. The first step is a clear inventory of every Windows device in your organization, what OS version it's running, whether it has received recent updates, whether Secure Boot is enabled, and whether its firmware has been updated by the manufacturer. Many businesses, particularly those that have grown quickly or managed IT informally, discover significant gaps at this stage.

Step 2: Identify your exposure

Once you have visibility, the picture becomes clear. How many devices are on Windows 10 without ESU? How many have Secure Boot disabled? How many haven't been updated in the past 90 days? These numbers tell you the size of the problem and how urgently it needs to be addressed before June.

Step 3: Make a practical upgrade decision

For devices that can upgrade to Windows 11, the upgrade path is the cleanest solution. It resolves the Secure Boot issue, brings the device back into mainstream Microsoft support, and extends the life of your investment. For devices that cannot run Windows 11 due to hardware limitations, the decision is between enrolling in ESU (which provides a limited extension) or replacing the hardware with modern, supported devices.

Step 4: Ensure ongoing update management

The Secure Boot deadline is a symptom of a broader pattern: businesses that manage device updates reactively rather than proactively. A structured endpoint management process, with visibility into update compliance across your fleet, means the next Microsoft deadline doesn't catch you unprepared.

The Bigger Picture for Your Business

The June 2026 deadline is one event. But it points to something more important: whether your business has reliable visibility into the security posture of every device your team uses.

Most organizations discover their exposure during an incident, a breach, an audit finding, or a compliance review, rather than before it. The businesses that avoid that experience are the ones that treat device management as an ongoing process, not a periodic reaction to external deadlines.

For businesses operating in Lebanon, Saudi Arabia, and across the region, where many organizations are running mixed fleets of older and newer hardware, the gap between assumed security and actual security is often larger than anyone expects.

A device audit takes days, not weeks. The clarity it provides lasts years.

Haceb has been supporting businesses across Lebanon, Saudi Arabia, and 13+ countries with IT infrastructure, device management, and Microsoft solutions for over 40 years. We help you understand where you stand before a deadline becomes a problem.

Talk to our team about a Windows device readiness assessment for your business.