Essendon wrote: » VMware Workstation is a type 2 hypervisor, meaning it runs on top of a host OS. You can use Win7/2008R2 has your host OS's. Just ensure that the host OS is 64 bit and you have VT-x turned on in your host computer's BIOS. VT-x is essential to running 64 bit guest OS's. I recommend you run Windows Server 2008 R2 as your host OS as it chews only about 480MB RAM when idling as opposed to Win7 which takes up over a gig. To play with AD, you need to promote a server to the status of Domain Controller. A DC runs Active Directory. See here for a how-to. Or here.