I've been seeking advice and hope that someone on this site can give me a straight answer.
I had a spare license of Windows XP Pro so when the Windows upgrade discount program was announced, I ordered the Windows 7 Business Pro Upgrade a few weeks ago. I was going to use that spare XP license on a new system I just built but a friend of mine, who's a Technet subscriber, let me use his Windows 7 RTM copy that he was not going to use. Our thought was that we could simply use the license key from the upgrade copy of Windows 7 Business Pro to transfrom the Windows 7 RTM copy that I now have installed to a licensed copy of Windows 7.
I was wanting to confirm that everything would be OK using the upgrade license key to register the RTM version before I started loading all of my software and files to my new PC and someone on another forum suggested that the upgrade license key will not work to register the RTM as an official licensed copy of Windows 7. Does anyone know if this is true? If so is there any known way to use the upgrade copy to upgrade the RTM in a similar manner as some people upgraded the RC to the RTM?