Microsoft is emailing Windows 10 users to encourage them to upgrade to Windows 11 before support for Windows 10 ends on October 14, 2025. The email includes suggestions for trading in or recycling old PCs and a link to check eligibility for the Windows 11 upgrade. While Microsoft states that PCs will still function after support ends, it warns that software updates will cease, leaving systems vulnerable to security threats. Users can pay for extended support if they choose to remain on Windows 10. The email has received scrutiny for not adequately warning about the risks of using an unsupported operating system and for promoting other Microsoft products.