Windows 11 has, for the first time, nudged past Windows 10 in StatCounter’s desktop web-usage figures — a symbolic milestone that prompted a wave of “Windows 11 is king” headlines. But dig a few inches below the surface and the real picture is one of a deeply fractured migration: an estimated 500 million PCs that physically cannot upgrade, another half-billion that haven’t bothered, and a one-year Microsoft security-patch bridge that’s tempting millions more to stay put. For everyday users and IT managers alike, the question isn’t who’s ahead in a popularity contest; it’s what to do about a platform that stubbornly refuses to die.

Web traffic says one thing; actual devices say another

The number most outlets are quoting comes from StatCounter’s public Desktop Windows Version Market Share Worldwide dataset. In recent months it has shown Windows 11 capturing the low-to-mid 50% range of desktop Windows pageviews, with Windows 10 hanging in the low 40s. That crossover point makes a great headline, but it’s vital to understand what StatCounter measures: samplings of web traffic, not an inventory of every PC plugged in around the world. A device that sits in an office and never opens a browser won’t show up. A fleet of kiosks running Windows 10 that surf only local intranet pages might be underrepresented. The metric is directional, not a hard device census.

A very different data point emerged when Dell held its Q3 2025 earnings call. Jeff Clarke described the Windows installed base that Dell tracks as roughly 1.5 billion devices, then broke it into two 500-million-device buckets: about 500 million that can’t run Windows 11 because of age or hardware constraints, and another 500 million that meet the requirements but haven’t yet upgraded. Dell’s numbers are vendor telemetry built for sales planning, not an independent audit, but they align with other industry estimates. When aggregated with StatCounter proportions and broader PC install-base estimates, the takeaway is clear: a “nearly one billion on Windows 10” figure that occasionally appears in reporting is plausible as a high-level estimate, even if it isn’t precise.

So the two core truths: web-usage metrics show Windows 11 pulling ahead, but the on-the-ground installed base remains overwhelmingly split — and a huge chunk of it simply cannot cross the Windows 11 bridge.

The hardware wall: why half a billion PCs are stuck on Windows 10

When Windows 11 shipped, Microsoft drew a hard line on system requirements. The official minimums include a 64-bit CPU from a specific approved list (with at least two cores and a 1 GHz clock), 4 GB of RAM, 64 GB of storage, a DirectX 12 / WDDM 2.x compatible GPU, and — crucially — UEFI firmware with Secure Boot capability and a Trusted Platform Module (TPM) version 2.0. Those last two items, TPM 2.0 and Secure Boot, are what routinely knock otherwise functional Windows 10 machines out of contention.

Many PCs shipped with TPM physically present but disabled in the firmware. Some older desktop motherboards can accept a plug-in TPM module, but not all. Whole generations of Intel and AMD silicon were excluded from the approved list, even if the chips are still perfectly capable of running modern workloads. The result: millions of business desktops, home laptops, and even high-end workstations from the 2016–2018 era are locked out of Windows 11 without a hardware intervention. Replacing those machines en masse isn’t viable for most households, and for enterprises it’s a multi-year budget exercise. Microsoft has acknowledged the security tradeoff — stronger hardware-rooted protections in exchange for leaving old devices behind — but that doesn’t change the reality for the end user staring at the PC Health Check result.

The inertia factor: why the eligible half hasn’t moved

The 500 million devices Dell described as upgrade-capable but still on Windows 10 illustrate something more psychological than technical. Several forces keep them there.

First, plain-old user inertia. For someone who mostly uses a browser, Office, and streaming apps, Windows 11’s redesigned taskbar, rounded corners, and Snap Layouts may feel more like a mild disruption than a must-have upgrade. The “if it ain’t broke” instinct is powerful.

Second, application compatibility. Many line-of-business tools, old payroll packages, custom printer drivers, and virtual-machine setups have certification matrices that still list Windows 10 first. IT departments in regulated industries won’t risk breaking a critical workflow until they’ve run their own validation cycles.

Third, Microsoft’s own Extended Security Updates (ESU) program for consumers has deliberately removed the urgency that might have forced a move. After mainstream support for Windows 10 ended on October 14, 2025, Microsoft offered a one-year extension of security-only updates through October 13, 2026. Consumers can enroll free by syncing their settings to OneDrive via Windows Backup, by redeeming 1,000 Microsoft Rewards points, or by paying a one-time fee of about $30. (Microsoft did later adjust some regional policies under regulatory pressure in the EEA, but the basic paths remain.) That ESU shutter buy time — for a year, an un-upgraded machine is still receiving critical patches, so the “you’re suddenly unprotected” cliff vanished. The side effect, of course, is that a large population of upgrade-eligible devices now has one less reason to change.

How we got here: the decisions that extended Windows 10’s life

Understanding today’s messy migration requires a quick look at the timeline and the choices that shaped it.

  • Windows 11 launched in October 2021 with the controversial hardware requirements intact. Even then, the support clock for Windows 10 was already ticking.
  • In 2024, Microsoft began signaling that Windows 10’s end of support would land on October 14, 2025, and that a consumer ESU program was coming — an unusual move, since ESU had historically been an enterprise-only affair.
  • By mid-2025, the ESU details solidified: one year, free for consumers who synced settings to OneDrive or redeemed Rewards points, $30 otherwise.
  • On the OEM side, Dell’s October 2025 earnings call explicitly framed the Windows 10 installed base not as a problem but as an enormous commercial opportunity — a refresh cycle waiting to happen, accelerated by new AI-capable PCs with neural processing units (NPUs).

In effect, Microsoft chose a gentle nudge rather than a shove. The ESU program, paired with the hardware barrier, created a two-speed migration: fast for those who wanted new AI features and modern hardware, slow for everyone else. That policy decision is the single biggest reason why Windows 10 still appears in such staggering numbers.

What you should do right now — depending on your role

The practical steps differ sharply for home users, IT administrators, and small-business owners.

If you’re a home user

  • Run the PC Health Check tool. It tells you precisely whether your machine meets the Windows 11 spec. If TPM is present but disabled, head into your UEFI firmware (often by pressing F2, Del, or Esc at boot) and look for “TPM,” “fTPM,” or “PTT.” Enabling it often clears the barrier instantly.
  • If your PC fails, weigh the ESU bridge carefully. Enrolling is painless — sync your settings to OneDrive, or redeem Rewards points, or pay $30 — but it’s a stopgap, not a strategy. You’re buying a year to plan for new hardware, nothing more. Mark October 13, 2026 on your calendar.
  • Consider alternatives for very old hardware. For a device used only for browsing, email, and light productivity, switching to a lightweight Linux distribution or converting it to a ChromeOS Flex machine can be a zero-cost way to stay secure and functional without replacing the PC.
  • Don’t force an unsupported upgrade. Registry hacks exist, but Microsoft has explicitly warned that unsupported Windows 11 installs may not receive updates and could cause instability. The risk isn’t worth it for a machine you rely on.

If you manage IT for a business

  • Inventory and segment your fleet immediately. Know which devices can upgrade, which need a hardware refresh, and which critical apps require Windows 10 compatibility. Use that inventory to build a phased rollout plan.
  • Start a pilot yesterday. Pick a representative group of non-critical users to validate your core apps on Windows 11. Surface printer, driver, and VPN issues early.
  • Use ESU as a scheduling tool, not a destination. For the devices you plan to replace in 2026, ESU keeps them patched. For anything you intend to keep longer, prioritize moving them to Windows 11 now.
  • Budget for the refresh. Dell and others see the 500-million-device “can’t upgrade” pool as a commercial opportunity, and that means new PCs with NPUs and AI features will be the primary sales pitch. Plan your procurement now so you aren’t scrambling when the ESU clock expires.

If you’re a small-business owner without dedicated IT

  • Do the cheap things first. Run PC Health Check on your office machines. Enable TPM where possible. Sign up for the free ESU if you need breathing room.
  • Talk to your line-of-business vendors. If you rely on specialized accounting, inventory, or POS software, ask the vendor whether their current version is fully supported on Windows 11. That answer will dictate your calendar more than any StatCounter headline.
  • Set a hard replacement deadline. Even if you take the $30 ESU path, plan to replace at least one machine per quarter through 2026 so the entire fleet is on supported hardware before October 13, 2026.

Outlook: a dual-OS world that will persist longer than headlines suggest

The crossover in web-usage stats is genuine and marks a real shift in which OS people are actively using online. But declaring a winner obscures the more important operational truth: for at least the next 12–18 months, most homes and businesses will be living in a mixed Windows 10/11 environment. OEMs like Dell and HP will keep marketing AI-powered Windows 11 PCs aggressively, and the refresh cycle will tick upward. Microsoft may well announce another ESU extension or tweak its eligibility rules as the October 2026 deadline approaches — something that could again shift the timeline. For now, the smartest move is to ignore sensational “king” proclamations, check your own hardware today, and make a plan that fits your wallet, your workflow, and the security calendar.