I'm relatively new to virtualization, I've started using it at work. There its been great to keep an ultra clean host OS and install required software on a per project basis creating new VMs every time. I want to use this at home because I have some software that I use for school and different stuff that is just loading my computer with unnecessary stuff that I only need when I'm using that program. I'm confused on how this works with Windows 7, however. Will my home use Win 7 Ultimate allow me to create multiple VMs from it or do they require a license for each one? Obviously I'm not willing to buy a new OS for each VM. Maybe you guys can shed some light on this for me. Thanks!