Thanks for the info, but I might not have been clear enough. I know the differences between an OEM version and a retail version, but this is what I have a question about:
Once you install an OEM copy of Windows 7 on a PC it must remain with that PC forever, unless upgraded to a newer version of Windows in the future.
If I upgrade an OEM copy via something like Anytime Upgrade (from Home to Profession, for instance), is it effectively like turning my OEM version into a retail version? Or am I still limited in terms of support and being tied to the same components?
The reason I ask is because as a student, I can get a $30 upgrade to Professional, and it would be cheaper to get the OEM version of Home and upgrade than to get a retail copy of Home.
Hope that makes sense.