Windows Me

Windows Millennium Edition was released in 2000 after Windows 98. It was based on the Windows 9x/DOS architecture and was often called the "home edition" of Windows 2000.

Windows ME was criticized for being unstable and the fact that Windows 2000, which came earlier that year, was considered much superior. Therefore, it is one of the most hated Windows versions, resulting in nicknames like "Mistake edition". One of the factors causing instability is the 9x kernel, and the way it works: apps run all in the same memory layer, so if one crashes, the others crash too.