Microsoft’s October 2026 Windows update arrived on Tuesday, October 13, and for businesses it’s more than a routine round of patches. This month brings two things worth your attention: important Windows security fixes, and a firm deadline for organizations still running Windows 11 version 24H2 on Home or Pro editions.
Here’s what the update means for your business, and what you should do next.
What Microsoft Released on October 13
October 13 was Microsoft’s monthly Patch Tuesday, when it releases security and quality updates for Windows, Microsoft 365 and other products. These updates close vulnerabilities that attackers could use to take over a computer, steal data or spread through a network.
Microsoft’s October 2026 security updates address CVE-2026-96951, a Windows Shell security feature bypass vulnerability that Microsoft has confirmed is being actively exploited. The vulnerability can allow an attacker to evade Windows Mark of the Web (MOTW) protections, reinforcing the importance of keeping business Windows devices current with Microsoft security updates.
Why This Windows Security Update Matters
When Microsoft confirms that a vulnerability is being actively exploited, applying the fix promptly becomes especially important. Attackers often look for organizations that haven’t yet installed available security updates, so delays can increase your risk.
For a business, an unpatched computer isn’t just one person’s problem. A single compromised laptop can be the entry point for ransomware, stolen credentials or a breach that affects your clients. That’s why getting security updates installed quickly, on every device, matters so much.
Windows 11 24H2 Home and Pro Have Reached End of Support
October 13, 2026 was also the end of servicing for Windows 11 version 24H2 on Home and Pro editions. Microsoft supports each Windows 11 feature update for a set period, and for Home and Pro editions of 24H2, that period is now over.
In practical terms, computers running Windows 11 24H2 Home or Pro no longer receive monthly security updates. Future vulnerabilities, including ones being actively exploited, won’t be patched on those machines. To keep receiving security updates, they need to move to Windows 11 version 25H2.
Many small and mid-sized businesses run Windows 11 Pro, so this deadline is likely to affect some of your computers, especially any that were set to postpone feature updates or haven’t been checked in a while.
Enterprise and Education Editions Are Different
It’s important to be precise here: Windows 11 24H2 isn’t unsupported everywhere. Microsoft gives Enterprise and Education editions a longer support window, and 24H2 Enterprise and Education remain supported until October 12, 2027.
So the question isn’t just “Are we on 24H2?” It’s “Which edition of 24H2 are we on?” A business with a mix of Pro and Enterprise licenses could have some computers that are covered and others that aren’t.
How to Check Which Windows 11 Version You’re Running
You can check any computer in under a minute:
- Press the Windows key + R, type winver and press Enter. The window that opens shows your Windows version (for example, 24H2 or 25H2).
- For the edition, go to Settings → System → About and look under Windows specifications, where you’ll see Home, Pro, Enterprise or Education.
If a computer shows Windows 11 Pro or Home, version 24H2, it should be updated to 25H2 as soon as possible.
Checking one computer is easy. Checking every computer in your organization, and making sure none are missed, is where most businesses run into trouble.
Why Businesses Shouldn’t Ignore Windows Update Management
Leaving updates to individual employees usually means some computers fall behind. Common problems include:
- Updates postponed indefinitely because someone clicked “remind me later”
- Feature updates blocked by old settings or compatibility issues nobody noticed
- Remote and traveling employees whose laptops rarely connect long enough to update
- No central view of which computers are patched and which aren’t
- Older hardware that can’t run the latest version and needs to be replaced
Unmanaged updates also create risk for cyber insurance. Many insurers now ask how quickly you apply security patches, and “we hope employees install them” isn’t a good answer.
How TCI Manages Windows Updates, Security and Lifecycle Planning
At TCI Technologies, Windows updates are part of how we manage our clients’ technology every day, not something left to chance:
- Centralized patch management, so security updates are tested, scheduled and installed across every computer
- Feature update planning to move devices from 24H2 to 25H2 before support deadlines, with minimal disruption to your team
- Device management with Microsoft Intune, including Windows Update rings and compliance policies that flag devices that fall behind
- Reporting that shows which computers are current and which need attention
- Lifecycle planning to identify older computers that need replacing before they become a security risk
- Layered cybersecurity, so patching is backed by endpoint protection, email security and monitoring
Our Quantum Managed IT Plans include this kind of ongoing management, so you don’t have to track Microsoft’s calendar yourself.
Schedule an IT & Cybersecurity Review with TCI
Not sure which versions your computers are running, or whether your updates are actually being installed? TCI can review your environment, identify devices affected by the 24H2 Home and Pro deadline, and help you put a reliable update process in place.
Request a free IT assessment, or take our free Cybersecurity Risk Assessment to get your Security Readiness Score. Prefer to talk? Call us at (516) 484-5151.
