You might be miffed that Microsoft is ending support for Windows 10 later this year, but one outraged customer has gone one further and is suing the tech giant over it.

As spotted by The Register, California resident Lawrence Klein filed a complaint against Microsoft over the fact he owns two Windows 10 laptops that can’t be updated to Windows 11, and is demanding the firm offers free support for longer than the current October 14, 2025 deadline.

As it stands, after this date Microsoft will no longer send out free software updates or security fixes to Windows 10 PCs. At the time of writing, StatCounter shows 42.9 percent of Windows computers worldwide currently run Windows 10, compared to Windows 11’s 53.5 percent.

Klein asks that a judge rules Microsoft should offer continued free support for Windows 10 "until the number of devices running the OS falls below 10 percent of total Windows users."

Microsoft is pushing customers to update their PCs to Windows 11, something that’s offered for free. But some older machines lack an internal hardware component known as a Trusted Platform Module 2.0, which is required to run Windows 11. It means thousands of people using a Windows 10 machine that still works perfectly well will be left without free security updates.

Microsoft is offering Windows 10 users a one year extension of security updates, but it’s charging $30 (£22) for it.

"With only three months until support ends for Windows 10, it is likely that many millions of users will not buy new devices or pay for extended support," Klein’s lawyers wrote in the complaint.

“Many individuals and businesses purchased or built devices with the expectation that they would be able to upgrade to a newer Windows operating system without purchasing new hardware,” they said. “In fact, unbeknownst to them, Microsoft was already making plans to update to Windows 11 while devices that continued to run Windows 10 and that were incapable of the upgrade were being sold.

His lawyers also point out that “Microsoft has typically provided longer transition periods for older operating systems,” with Windows 8 support ending eight years after Windows 10 launched and Windows 7 supporting ending eight years after Windows 8 launched.

The complaint quotes estimates that about 500 million Windows 10 devices worldwide might be incompatible with Windows 11. The only way for these users to get Windows 11 is to buy a new PC.

Oddly, Microsoft has recently promised to provide security updates for Microsoft 365 apps on Windows 10 for three years till October 10, 2028. That means you could continue to used Word, Excel, PowerPoint and the rest in relative confidence that they will work and be secure.

The worry for Windows 10 customers otherwise is the lack of security patches will leave them and their online activities open to nefarious activity from cyber attack, as well as the fact their PCs are reaching end of life sooner than it was expected.