I am running Win7 guest/Win 8.1 host using virtualbox 5.0.14 r105127. I use the setextradata command listed in the virtualbox online manual here : (nevermind, I can't post links apparently, but it's oracle's online manual for virtualbox hosted on their site in section 9.12) Which are: Code: VBoxManage setextradata "VM name" "VBoxInternal/Devices/pcbios/0/Config/DmiProcManufacturer" "GenuineIntel" VBoxManage setextradata "VM name" "VBoxInternal/Devices/pcbios/0/Config/DmiProcVersion" "Pentium(R) III" (But I used different input strings). The commands completes with no error messages, putting me back at the command prompt. But when I go in device manager and to My Compuer>About they both still show me the host's CPU, so obviously something isn't working. If someone could please help me I'd really appreciate it. Thanks in advance. P.S.: Also, when you use setextradata to configure DMI and/or hardware details, are those changes persistent on a per VM basis until you modify them otherwise, or do you have to set them prior to each boot? Thanks again.