Hi Bob-
I'm not sure if this information is still useful to you, but it may be to others.
You can get Windows 7 discs from TechSoup and install them on your computers. What MS doesn't allow is doing an "in-place" upgrade from Vista Home to Windows 7 Business (as Autumn explained).
But you can use the Windows 7 discs to do a "clean" install on your computers, basically starting from scratch with the new operating system. You have to backup all your data and programs first, then install Windows 7, then install your software again and copy back your old data.
In a nutshell the process would be:
- Backup all your data onto another drive.
- In Vista, insert the Windows 7 disc, and run the Windows 7 Setup program on the disc.
- The computer will restart from the Windows 7 install disc. During Setup you must erase your hard drive and install Windows 7 from a clean state.
- After setup is finished, connect your backup drive, and use the Windows Easy Transfer program to copy your data from the backup onto your new Windows 7 installation.
- Install all your programs again in Windows 7.
It would be easier if MS supported Home > Business upgrades, but since they don't, this is really the next best option. More information is available here and elsewhere online.
Daniel