The October Deadline That'll Catch People Is Office 2021

Nothing breaks on October 14

October 13 is a bigger date for small businesses than it looks. And the product that's going to catch people isn't Windows. It's Office 2021. The technical part — you can skip this box Support ends October 13, 2026 for Office 2021 and Office LTSC 2021 (all applications), Windows 11 Home and Pro version 24H2, Windows 10 2016 LTSB and IoT Enterprise LTSB 2016, and Year 3 of Extended Security Updates for Windows Server 2012 and 2012 R2. A second wave follows on November 10, 2026: Windows 11 Enterprise, Education and IoT Enterprise version 23H2, plus .NET 8, .NET 9 and PowerShell 7.4. What that actually means Three of those matter to a typical small business. Office 2021. Word, Excel, Outlook, PowerPoint — the version you buy once instead of paying every month. After October 13 it keeps working, but Microsoft stops issuing security fixes for it. The businesses hit hardest here are the ones who chose it deliberately. They paid once, up front, specifically so they'd never have a recurring software bill. Now they're looking at exactly that recurring bill, with about six weeks' notice. Windows Server 2012. Microsoft ended normal support for this years ago and has been selling what it calls Extended Security Updates, or ESU — essentially paying for extra years of security patches after the official end date. October 13 is the end of the third and final year. There is no fourth year to buy. If you're running it, this really is the end of the road. Windows 11 version 24H2. This is the one that catches people out, because "I'm on Windows 11" sounds like being current. But Windows 11 puts out a new version roughly every year, and each one is only supported for a limited window. Being on Windows 11 does not mean you're on a supported version of Windows 11. Most people have never checked which one they have. Nothing breaks on October 14 Your computers will turn on. Excel will open. Nothing dramatic happens. What stops is the security fixes. Any flaw discovered after that date stays open on your machines permanently. You won't notice, and that's precisely the problem — the cost turns up months later, usually attached to something else going wrong. A vendor drops support for the version you're on. A new printer needs a driver nobody publishes anymore. Your insurance renewal asks whether you're running unsupported software and you can't answer it well. What we'd actually do Find out what you're running. That's genuinely step one, and most businesses can't answer it off the top of their head. On any Windows computer, type winver into the search box next to the Start button and press enter. A small window opens showing the exact version. Do that on a handful of machines around the office and you'll know within ten minutes whether October 13 concerns you. For Office: open Word, go to File, then Account. It'll tell you whether you're on Office 2021 or a Microsoft 365 subscription. If it says 2021, you're on the clock. Once you know what you have, you've got about three months to decide calmly — replace, upgrade, or budget for it in the next cycle. If you find out in February instead, you have no options, only bills. Six weeks is plenty of time to plan this once. It's not enough time to plan it twice.