Microsoft's Windows 10 will reach its end-of-support date on October 14, 2025, after a standard 10-year support lifecycle. Most editions, including Home, Pro, and Enterprise, will stop receiving updates, although PCs running Windows 10 will continue to function without updates. Windows 10 Enterprise Long Term Servicing editions have different end dates, with some extending support until 2029. Current data indicates that approximately 1.6% of Windows 10 PCs are replaced by Windows 11 each month, suggesting that around 35% of the 1.4 billion Windows devices will still be using Windows 10 by the end-of-support date, equating to over 500 million PCs potentially vulnerable to cyber threats. As of April 2025, about 54% of PCs globally are still running Windows 10. Users likely to remain on Windows 10 include those with incompatible hardware, corporate environments that have standardized on Windows 10, and users resistant to upgrading due to dissatisfaction with Windows 11. Microsoft faces challenges related to a significant number of unsupported PCs, and while extended support options exist for enterprise customers, consumer adoption is expected to be low. Users unable or unwilling to upgrade may consider non-Microsoft operating systems or continue using Windows 10 without official support, which poses security risks.