The Windows Vista Extended Kernel enables Vista x64 users to use applications intended for Windows 7/8.x/10 and up, such as Firefox 115, OBS Studio 29 and Chromium 111.
Have your extended kernel questions answered in the FAQ section and download it here.
Please note that the extended kernel is no longer receiving updates. As such, some applications may not work. An alternative with greater compatibility and ease of use known as Second System is being actively developed.