Windows 11 now runs on 47.8% of the world’s desktop Windows PCs, according to StatCounter’s June 2025 data, putting Microsoft’s latest operating system neck-and-neck with Windows 10 for the first time. The milestone, reported just four months before Windows 10’s October 14, 2025 end-of-support deadline, signals a mass migration that has accelerated throughout 2025, driven by looming security risks, hardware refresh cycles, and persistent upgrade nudges from Microsoft.

The desktop-only snapshot tells a compelling story: Windows 10 clings to 48.9%, a razor-thin lead, while Windows 11 has clawed its way from minority status to near parity. A broader StatCounter view that includes all device categories—tablets, convertibles, and other form factors—placed Windows 11 above the 50% mark in July 2025, at 53.38%, with Windows 10 dropping to 42.98%. Such variations underline why headlines often differ; the story changes slightly depending on which StatCounter dataset you cite. For the clearest picture of traditional PC usage, analysts and IT planners lean on the desktop figure, which isolates the primary workhorse environment where compatibility and support deadlines matter most.

The Numbers: A Complex Picture

Interpreting market-share data requires nuance. StatCounter’s desktop tracker draws from over a billion page views monthly across millions of websites, weighting results by traffic. That methodology can undercount enterprise machines sitting behind VPNs or corporate networks that limit external web access, and it may oversample consumer browsing patterns. Still, the trend direction is unambiguous: Windows 11’s ascent has been steep and steady in 2025. Independent reports from Windows Central and Tom’s Guide confirm the same upward trajectory, even if exact percentages shift by a point or two. NetMarketShare and Steam’s hardware survey tell a related story—the latter showing Windows 11 overtook Windows 10 among gamers earlier this year—reinforcing that the migration is real and widespread.

The “nearly half” narrative, therefore, is a defensible summary when you anchor to StatCounter’s desktop view. For IT leaders planning budgets and deployment timelines, it’s the critical number because desktop PCs are the devices that will bear the brunt of the October deadline.

Why the Spike Now? Three Converging Forces

The acceleration isn’t accidental. Three major factors have aligned in 2025 to push Windows 11 adoption into overdrive.

1. The October 14, 2025, Deadline
Windows 10’s end-of-support date is no longer a distant abstraction. After October 14, Microsoft will stop delivering free security updates, bug fixes, and technical support for most editions. For organizations and consumers alike, the countdown has become a concrete motivator. Microsoft’s lifecycle documentation explicitly warns that devices left on unsupported Windows 10 will face escalating security vulnerabilities, compliance gaps, and application incompatibility. Extended Security Updates (ESU) are available—both for consumers and enterprise—but they come with costs, enrollment friction, and a limited lifespan. The simplest way to stay protected is to move to Windows 11, and millions are doing just that.

2. Aggressive Upgrade Campaigns and ESU Complexity
Throughout 2024 and 2025, Microsoft amplified its upgrade messaging. Full-screen prompts, taskbar notifications, and even Windows Update reminders have made the transition hard to ignore. Simultaneously, the consumer ESU program, which allows individuals to purchase a single year of extra security updates, launched with uneven availability and a confusing sign-up experience. Reports from tech outlets like TechRadar and Windows Central noted that many users encountered errors or delays when trying to enroll. That friction has pushed a segment of the holdout population toward a clean OS upgrade or a new PC purchase rather than navigating ESU hurdles. Enterprise admins, too, are finding that the ESU path for volume licensing requires planning and isn’t a simple dial-tone they can flip at the last moment.

3. New Hardware and Corporate Refresh Cycles
The PC market’s supply chain has shifted decisively toward Windows 11. Since late 2023, virtually every new consumer and business laptop or desktop ships with Windows 11 preinstalled. Even cost-conscious buyers acquiring budget machines end up on the new OS by default. At the same time, many organizations are aligning their standard hardware refresh—typically every three to five years—with the Windows 11 requirement. Admins reason that if they must replace aging devices anyway, they might as well do it now and sidestep the late-2025 scramble. This organic hardware turnover is steadily eroding Windows 10’s installed base.

The Hardware Hurdle: TPM 2.0 and Beyond

Windows 11’s strict minimum hardware requirements remain the single biggest obstacle to faster adoption. Unlike the mostly seamless jump from Windows 7 to Windows 10, upgrading to Windows 11 demands a 64-bit processor with at least two cores running at 1 GHz or faster, 4 GB of RAM, 64 GB of storage, UEFI firmware with Secure Boot, and—most controversially—a Trusted Platform Module (TPM) version 2.0. Although Microsoft maintains a list of compatible CPUs, many perfectly capable PCs from the 2016–2018 era fail solely because they lack TPM 2.0 or have it disabled in firmware.

This requirement, intended to raise the security baseline, has generated a dual-edged reaction. On one hand, it forces the retirement of older hardware that may lack modern defenses against firmware attacks. On the other, it creates a significant e-waste concern: an estimated 240 million PCs worldwide could become obsolete when Windows 10 support ends, according to analysis by Canalys. Environmental advocates and cost-conscious businesses have criticized the mandate, noting that many of these machines would otherwise remain serviceable for basic tasks. Microsoft’s PC Health Check tool—and third-party utilities like WhyNotWin11—help users diagnose exactly what’s missing, but for many, the verdict is stark: buy a new computer or stick with an unsupported OS.

For those on the borderline, a few practical steps can nudge a PC into eligibility. Enabling TPM in the BIOS, flipping Secure Boot on, or adding a discrete TPM module (on motherboards that support it) are viable for a subset of desktop machines. Users have also reported success with upgrading to an SSD to meet the 64 GB floor, though that’s rarely the primary blocker. Microsoft warns that even after a hardware change, Windows Update may take several days to recognize the new compatibility status. IT pros recommend running the health check, making the tweak, and then waiting one or two patch cycles before attempting the upgrade.

What Users and IT Admins Must Do Now

For the nearly 49% of desktop users still on Windows 10, the clock is ticking. Every week that passes without a plan increases the risk of hitting the October deadline unprepared. Here’s a concrete action list organized by audience.

For individual Windows 10 users:
- Run the PC Health Check tool. It’s free from Microsoft’s website and instantly tells you if your machine meets the requirements.
- If eligible, test the upgrade. Back up your files, perhaps clone your drive, and run the installer from Windows Update on a non-critical machine. The in-place upgrade generally preserves apps and data, but having a rollback plan is wise.
- If not eligible, evaluate your options. You can look into enabling TPM/Secure Boot, buy a new PC, or sign up for consumer ESU. Microsoft has a dedicated ESU landing page that walks through the purchase process, though availability varies by region.
- Don’t ignore the deadline. Post-October 14, your Windows 10 PC will continue to work, but without any security patches, it becomes a magnet for exploit. If you handle sensitive information or connect to the internet regularly, upgrade or replace.

For IT administrators managing fleets:
- Inventory your hardware now. Run a thorough audit to identify machines that can be upgraded versus those requiring replacement. Tools like Microsoft Endpoint Configuration Manager, Intune, and third-party solutions like Lansweeper can automate this.
- Begin application-compatibility testing. Critical line-of-business apps that run on Windows 10 may have issues on Windows 11. Pilot with a cross-section of departments and document any workarounds.
- Plan a staged rollout. Don’t blast the entire organization at once. Start with a small group of tolerant early adopters, validate drivers and user experience, then expand in waves.
- Factor in hardware lead times. If you need to purchase new devices, order them now. Supply chains have normalized, but custom configurations can still take weeks.
- Evaluate ESU for legacy hardware. For devices that can’t upgrade and can’t be replaced immediately, a one-year ESU subscription through volume licensing provides breathing room. Be aware that after year one, the price doubles each subsequent year.

Risks and Reality Checks

The migration toward Windows 11 hasn’t been entirely smooth. Several friction points continue to cause headaches.

ESU enrollment troubles. The consumer ESU program’s rocky rollout in mid-2025 left many users stranded with error messages during the purchase process. Microsoft has since ironed out some issues, but the experience highlighted how dependent the transition is on flawless backend infrastructure. Enterprise ESU, while more mature, still requires careful contract management and isn’t available for all editions.

E-waste and sustainability pushback. The forced obsolescence narrative has gained traction. Publications like Wired have juxtaposed Microsoft’s ambitious sustainability pledges with the reality of millions of functional PCs heading for landfills. Some organizations are extending the life of unsupported machines by repurposing them for offline tasks, switching to light-weight Linux distributions, or donating them to schools—but those efforts only mitigate part of the environmental cost.

Metric interpretation battles. Every time a new StatCounter report surfaces, social media erupts with debates about sampling, bot filtering, and regional skew. IT professionals should take the exact percentages with a grain of salt and focus on the directional signal. The important takeaway is that Windows 11 adoption is accelerating rapidly, and the trend line is firmly upward. Whether the current figure is 47.8% or 53.38% matters less than the fact that, by year’s end, Windows 11 is on track to hold a decisive majority.

The Road Ahead: What Comes After October 14?

Once the deadline passes, Windows 10’s share will continue to shrink, but it won’t vanish overnight. Historical precedent from Windows 7’s end-of-life in January 2020 shows that a stubborn rump of users hangs on for months, sometimes years. Some are unaware, some are indifferent, and some rely on legacy software that genuinely can’t transition. The difference this time is Microsoft’s much louder communication push and the tighter coupling of modern hardware features with the OS—including AI-powered capabilities that require Neural Processing Units found only in Copilot+ PCs. Those advanced machines represent a small slice of the market today, but they point to a future where staying current is essential to accessing new functionality.

For the Windows enthusiast community, the StatCounter data is both validation and a call to action. It confirms that the ecosystem is moving, but also highlights the substantial number of users still at risk. Those with the knowledge should help friends, family, and colleagues navigate the transition. A simple weekend walk-through of the PC Health Check tool can prevent a last-minute scramble. Moreover, keeping an eye on secondary trackers like the Steam Hardware Survey—where Windows 11 now commands roughly 60%—offers a more gamer-centric pulse, reassuring that software and driver support will only grow stronger.

In the end, the “nearly half” milestone is as much about what it signals as the number itself. The center of gravity in the Windows world is shifting, and by 2026, Windows 10 will likely look as dated as Windows 7 did a few years after its retirement. Whether that transition is smooth or chaotic depends on the actions taken in the next few weeks.