The official end of Windows 10 is set for October 14, 2025, after which users will no longer receive technical support, new features, or security patches. Windows 10's global desktop market share has decreased from nearly 70% to approximately 53% over the past year, indicating a shift towards Windows 11. Microsoft 365 apps, including Teams, Outlook, Word, Excel, and OneDrive, will continue to receive security updates on Windows 10 until October 2028. The Extended Security Updates (ESU) program offers optional, paid security patches for Windows 10 after its end of support. Users may face significant hardware costs when upgrading to Windows 11, and alternatives like macOS or Linux are also options to consider.