Lawrence Klein, a San Diego resident, has filed a lawsuit against Microsoft challenging the company's decision to discontinue support for Windows 10 in October. Klein argues that Microsoft should maintain free support for Windows 10 until its user base falls below 10% of all Windows users, claiming the discontinuation pressures users to purchase new devices and helps Microsoft establish a monopoly in the generative AI market. As of April 2025, Windows 10 users make up approximately 52.94% of all Windows users, while Windows 11 adoption has been slow. Klein estimates that over 240 million devices may become obsolete due to Windows 11's hardware requirements, leading to increased e-waste. He criticizes Microsoft's strategy as atypical, noting that the transition to Windows 11 is being mandated only four years after its release, and he describes Windows 11 as "wildly unpopular." Klein seeks judicial intervention to stop misleading advertising, ensure clear communication about support discontinuation, and mandate continued updates for Windows 10 at no extra cost until its user base declines significantly. Klein is only requesting reimbursement for attorney's fees.