A California resident has filed a lawsuit that could upend Microsoft's plans to end free support for Windows 10 in October 2025, alleging the company is forcing millions of users toward new hardware to dominate the generative AI market. Lawrence Klein, who owns two laptops that cannot upgrade to Windows 11 due to hardware restrictions, filed the complaint in San Diego Superior Court, accusing Microsoft of unfair business practices. The suit demands that Microsoft continue providing free security updates for Windows 10 until its market share drops below 10%, or alternatively, loosen the strict hardware requirements for Windows 11.

The legal challenge arrives as Windows 10's end-of-support date of October 14, 2025, looms, after which the company will stop delivering free security patches. Microsoft has offered a one-year Extended Security Updates (ESU) program for consumers at a cost of $30 or through Microsoft Rewards points, but that path requires a Microsoft account—a sticking point for privacy-conscious users. Klein's complaint frames these policies as a deliberate strategy to push users into buying new, AI-optimized PCs that come with Windows 11 and Microsoft's Copilot assistant preinstalled.

The Core Allegations: Forced Obsolescence and AI Monopolization

Klein's suit, filed under California's consumer protection and unfair competition laws, argues that Microsoft artificially set an end-of-life for Windows 10 while a significant portion of users still rely on the operating system. He contends that this forces consumers to either buy new, Windows 11-capable hardware or pay for extended updates, amounting to an unfair business practice. The complaint goes further, alleging that the move is tied to Microsoft's ambitions in generative AI.

By bundling Copilot with Windows 11 and setting hardware requirements that exclude older machines, Microsoft is allegedly creating a captive audience for its AI services and dampening competition. The complaint states that this conduct is designed to "monopolize the generative AI market," leveraging the Windows ecosystem to give Copilot a distribution advantage over rivals. Klein's legal team asks the court to halt what they describe as misleading advertising and to grant injunctive relief that would keep Windows 10 alive with free security patches until the active install base falls below a specified threshold, like 10%.

Why Millions of PCs Can't Upgrade: The TPM 2.0 Barrier

Windows 11's system requirements include TPM 2.0, Secure Boot, and a list of supported CPUs—primarily Intel 8th generation or newer, AMD Zen 2 or newer, and equivalent Qualcomm chips. Microsoft has repeatedly called TPM 2.0 "non-negotiable," citing security benefits that protect against firmware and hardware-level attacks. However, this requirement excludes hundreds of millions of functioning PCs from the free upgrade, even those with relatively recent processors that simply aren't on the approved list.

Klein's laptops fall into this category: they run Windows 10 perfectly but lack TPM 2.0 or a supported CPU, making them ineligible for the free Windows 11 migration. While tech-savvy users can bypass these checks via registry edits or modified installers, Microsoft warns that such unsupported installations may not receive updates and could suffer stability issues. The lawsuit seizes on this gap, arguing that the official lack of a supported upgrade path constitutes a coercive tactic to drive new hardware sales.

Microsoft's Response and Existing Options for Consumers

Microsoft has not publicly commented on the lawsuit, but the company's published policies provide multiple pathways for Windows 10 users. The official lifecycle timeline says free support ends October 14, 2025. After that, consumers can:

  • Upgrade to Windows 11 if their device meets the minimum requirements, at no cost.
  • Enroll in the consumer ESU program for one year (through October 13, 2026) by paying $30, redeeming 1,000 Microsoft Rewards points, or syncing Windows Backup to a Microsoft account—which effectively requires a Microsoft account.
  • Buy a new Windows 11 PC.

The Microsoft account requirement for ESU has drawn criticism. Even if a user pays the $30 fee, they must link the purchase to a Microsoft account, shutting out those who intentionally avoid cloud-connected accounts for privacy or security reasons. This detail is cited in the lawsuit as further proof that Microsoft is steering users into its ecosystem rather than offering neutral support.

Market Context: Windows 11 Overtakes Windows 10

Data from analytics firms like StatCounter shows that Windows 11 surpassed Windows 10 in global market share in mid-2025, a milestone that coincides with the growing urgency around the Windows 10 sunset. Klein's lawsuit uses these numbers to argue that Microsoft is accelerating the migration while many PCs remain ineligible. Yet the fact that Windows 11 is now the majority operating system could undercut the claim that Microsoft is prematurely killing a dominant platform.

Industry estimates of the number of devices that cannot upgrade vary widely, but the lawsuit cites figures in the hundreds of millions. Klein frames this as an environmental issue as well, arguing that forcing hardware churn on such a scale will generate massive e-waste—a point that resonates beyond pure legal arguments and adds a public-interest dimension to the case.

Legal experts note that consumer lawsuits against Microsoft over upgrade practices have succeeded before. In one notable example, a California woman received compensation after a forced Windows 10 upgrade caused business losses. However, the current case faces significant hurdles.

Microsoft can point to a legitimate security rationale for the TPM 2.0 requirement, supported by years of public documentation and industry-standard security practices. Courts tend to defer to companies on safety-related product design choices, making it difficult to prove that the hardware restrictions are purely profit-driven. Additionally, the company offers a free upgrade for eligible devices and a paid extension option, which undermines claims of forced obsolescence. The relief sought—compelling Microsoft to support an older operating system for free until a market-share threshold is met—would be an extraordinary judicial intrusion into product lifecycle management.

The antitrust dimension is also a heavy lift. To prove monopolization, Klein would need to establish market power in a relevant market, anticompetitive conduct, and antitrust injury. Microsoft can argue that the AI assistant market is nascent and highly competitive, with players like Google, Apple, and OpenAI already offering alternatives. The inclusion of Copilot in Windows 11 could be framed as a procompetitive integration that benefits users by lowering friction.

Potential Outcomes and Timeline

The suit is in its earliest stages. Microsoft will likely file a motion to dismiss, challenging standing, pleading sufficiency, or the legal theories. If the case survives, discovery could take months, followed by motions for summary judgment. A preliminary injunction seeking to halt the October 2025 end-of-support deadline is possible but rarely granted for such sweeping policy changes without clear, immediate harm.

Given the approaching deadline, any court order that meaningfully alters Microsoft's plans would need to come quickly. Most observers expect a drawn-out legal battle. A settlement—perhaps involving extended free ESU windows, enrollment simplifications, or clearer disclosures—is more plausible than an outright rollback of Windows 11 hardware requirements. Either way, the litigation introduces uncertainty just as millions of users and IT administrators plan their migration strategies.

What This Means for Consumers and IT Decision Makers

For now, the official October 14, 2025, end-of-support date remains in effect. Users and organizations should press ahead with migration planning:

  • Run Microsoft's PC Health Check tool to determine if existing hardware can upgrade to Windows 11.
  • If not eligible, evaluate the ESU program—but be aware of the Microsoft account requirement and the $30 cost (or 1,000 Rewards points).
  • Consider replacing devices that cannot be upgraded; budget for hardware refreshes if necessary.
  • For technical users, assess whether an unsupported Windows 11 installation or a shift to Linux is viable for your workloads.
  • Back up all important data before making any major system changes.

The e-waste argument may gain traction in public discourse, but it won't change immediate security realities. An unpatched Windows 10 PC becomes increasingly vulnerable to malware and exploitation after support ends. For businesses, unsupported endpoints can create compliance gaps and incident-response liabilities.

Beyond the Courtroom: Platform Power and AI Bundling

The lawsuit touches on broader tensions that extend far beyond one operating system. As major platforms embed AI assistants by default, questions about competition, consumer choice, and the environmental cost of hardware churn will intensify. Microsoft's integration of Copilot into Windows 11—and the hardware gatekeeping that accompanies it—represents a test case for how aggressively a dominant ecosystem can leverage its installed base to push new services.

Regulators in the U.S. and Europe are already scrutinizing similar practices. The outcome of Klein's suit, even if it ends in a settlement, could signal the judiciary's appetite for policing these transitions. For now, the case serves as a dramatic reminder that the end of Windows 10 is about more than just software—it's a flashpoint for debates over security, sustainability, and the future of personal computing in an AI-saturated world.