Microsoft has officially ended support for Windows 10, which raises significant security concerns due to the lack of security patches. Microsoft Defender Antivirus (MSDA) will continue to provide protection for Windows 10 during the Extended Security Updates (ESU) period, which lasts until October 2028, but users without ESU will remain vulnerable. Upgrading to Windows 11 is a free option for legitimate Windows 10 license holders, ensuring access to the latest features and security updates. Alternatively, users can consider transitioning to Linux, with distributions like Linux Mint, Fedora, and Pop!_OS offering various advantages.