We'll see if these prices change over the next year but Microsoft announces that most consumers and businesses that use Windows 10 after October 2025 will have to fork up $61 per device per year (and the price will double every year). in order to get extended security updates. There's some discounts if you're a school or cloud computing. https://www.theverge.com/2024/4/3/24120093/microsoft-windows-10-extended-security-updates-price