We have extensive experience with Dos 3.0 -7.0, Windows 95, 98, 2000, XP home, XP media, and XP Professional.Windows 7 Home Premium, Windows 10 Professional version local workstation operating systems. We have some experience with Vista Home, and Vista Business, it is a resource and memory hog, prerforms slow, and adding a Vista computer can disrupt some existing "peer to peer" networks. We do not Reccomend Vista at all, nor Windows 8 due to its unintuitive graphical user interface (re-learning Windows), especially on mission critical systems. We recommend windows 7 Pro and Windows 10 Pro as their software environments allow, as some business programs have not been updated to Windows 10 as yet. And both of these operating systems support Windows Remote Desktop Hosting.