MinWin is arguably the windows kernel without most of the userspace. Though it's still massive and contains a lot of userspace: 25MB on disk, 40MB in memory. T

MinWin is arguably the windows kernel without most of the userspace. Though it's still massive and contains a lot of userspace: 25MB on disk, 40MB in memory. The xbox kernel has absolutely no connection, it forked off at a completely different point and was hacked and slashed until it fits into just 256KB.