Yeah. They say Microsoft won't provide "active support," so maybe that's why Vista is not included? It's probably mainly because Vista has a relatively low mar

Yeah. They say Microsoft won't provide "active support," so maybe that's why Vista is not included? It's probably mainly because Vista has a relatively low market share: probably lower than XP. It's thus not worth supporting as the earliest version of Windows they support. Edit: Just checked. Windows XP lost non-extended support in 2009, whereas Vista lost it in 2012.