I had "Windows 7 64bit Home (OEM)" installed on this system and purchased a standalone retail "Windows 7 64bit Professional" version in order to upgrade to Professional before I make the jump to Windows 10. I used "Anytime Upgrade" to input the new key and upgrade my Home version to Professional. After successfully completing the process I noticed "System" is still displaying an OEM Product ID although I purposely purchased a non OEM license, since sooner or later my mobo will need to be replaced and I do not want to have to purchase another license just because of this fact. My question is as follows:
If I were to upgrade to Windows 10 now with "System" displaying the OEM Product ID will it give me a Windows 10 OEM or RTM key?
Will using the "Change product key" option under "System" make a difference?
Or do I need to clean install Windows 7 Professional 64bit to make sure the retail key is used to upgrade me to a Windows 10 Professional Retail key?