Windows Vista reached the end of its mainstream support on April 10, 2012, and there has been no extended support available since April 11, 2017. This means that Microsoft no longer provides updates, bug fixes, or technical assistance for Windows Vista users. Without regular updates, the operating system may become increasingly vulnerable to security risks and compatibility issues with newer software. While users can still operate the system, it is important to note that they may face limitations in terms of support and safety. For further details on the status of Windows Vista, users may want to check Microsoft's current web page, which often contains information regarding product support lifecycles.