Huihong Luo: This topic may be especially interesting for you. There *may* be a way to make VirtualBox compatible with Windows 7 "XP Mode". For XP Mode to work in VBox Guest please see: http://www.virtualbox.org/ticket/4032 For XP Mode to work on VBox Host please see: http://www.virtualbox.org/ticket/5559 -- -"Technologov"