I'm wondering if anyone knows an answer to regarding the registration of Windows 7 when it's finally released October 22nd. I built a new PC and was going to install a copy of Windows XP Pro and then upgrade to Windows 7 Business Pro when it came out. In fact I have already pre-purchased my copy of Windows 7 when the discounted limited time offer was made available. Instead of installing XP I installed Windows 7 pro RTM that was made available to me by a Technet subscriber that wasn't going to use his avaiable copy. What this Technet subscriber suggested was to not register Windows 7 RTM and keep rearming it until I get my retail copy. At that point it was suggested that I could simply use the License key that came with the retail copy and register the RTM version without having to reinstall Windows 7. At this point I have Windows 7 running with a very limited suite of software installed but I would like to begin the process of moving software and data from my real day-to-day workhorse PC to my new PC. If I can use the retail key on the RTM I would start the migration process today but I'm concerned that if I do so, there will be some catch and I'll have to wipe the drive and install the retail copy anyway. Can anyone tell me if I'll be able to do this (use my retail key to register the installed RTM version)?