Microsoft has announced that starting with Windows 11 version 24H2, the JScript9Legacy engine will be enabled by default for all scripting processes that previously relied on the classic JScript engine. This new engine offers improved protection against threats like cross-site scripting (XSS) and enhances performance. Users will not need to take any action, as existing scripts will continue to function normally. In case of compatibility issues, organizations can revert to the previous engine temporarily. The transition marks the retirement of JScript, which has been part of Windows since 1996, as it is now considered outdated and vulnerable. Microsoft has decided to discontinue support for JScript due to the retirement of Internet Explorer and the adoption of the Edge browser. This update applies only to Windows 11 version 24H2 and later, while older versions will still use the original JScript engine.