Possible Duplicate:
When reinstalling Windows 7 or Vista, does the language, version, architecture (64-bit or 32-bit) or source (OEM, retail, or MSDN) matter?
I installed the RTM version of Windows 7 Professional and today I received the upgrade media for Windows 7 Professional. It won't take the serial number because the RTM is the full version, duh. Can I "upgrade" my RTM version and still keep all my settings and programs?
To clarify, the RTM is a full install version and I have the upgrade media. So, no changing the key won't work.