I used instructions I found online to install Windows 10 in a disk image without upgrading Windows 7. Basically I was able to get Windows 10 to boot and activate via a VHD file stored on an external HDD and now I get to keep Windows 7 but can upgrade to Windows 10 any time and it wont cost me a cent (since my hardware and Windows 7 key are now in the Microsoft database as being able to activate for Windows 10)