Just bought Windows Server 2003 on Ebay. The seller now tells me that it is an OEM version and asks if I would want a refund. What would be the difference? My intention is to install it on VM Ware and possibly try to virtualize it in the future. What is the downside of this purchase if the install is on a virtual machine where applications are not supposed to be aware of hardware environments? Additionally, are there any legal entaglements?