What if you are a developer and don't want your application to run in a VM? Or what if you want your application to install (or behave) in a different way when target OS is a virtual one? Paul Adare, one Virtual PC Most Valuable Professional (MVP), wrote a simple WMI query that verify if you are running on a VM: On Error Resume Next strComputer = "." Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root \cimv2") Set colItems = objWMIService.ExecQuery("Select * from Win32 _BaseBoard",,48) For Each objItem in colItems if objitem.Product = "Virtual Machine" Thanks Paul!