The real question is which VM software is best or does it really matter? Virtual Box, VM Ware, the app in Windows 10 Pro or something else. ? Will be my first Virtual Machine. Basically the main reason for it is some Windows 7 software I have and want to use that won't install on Windows 10. Will need to be able to save / print files and Doc's and access them from Windows 10. Also I have Windows 7 Pro around with and old key. Wonder if Microsoft will care since they don't support it anymore. Maybe I need a new key.