Ok, I was messing about in VMs whilst testing my new DVD. I made an SLP2.1 activated Dell VM, with Home Premium. I tried upgrading it with my 7 DVD, it told me to use windows anytime upgrade. Now curious, I open anytime upgrade, and see there's an option to input an upgrade key. Now, I wonder, will any product key work? An SLP key, for instance? Well, to test, I put in an Ultimate SLP key. It validated the key... "No way", I think to myself. "No way MS would be this stupid". I was expecting an error message in the middle of the upgrade, or a deactivation. But neither happened. I had internet disabled on the VM, so it didn't install updates first. Whole process took a few minutes. And it left me with 7 Ultimate, SLP activated. So, in theory, the same trick should work on any Laptop or PC that comes with Home Premium (or starter, I tested that afterward). So, people who bought shiny new 7 machines, you only need an SLP key to upgrade! I'm considering memorising an SLP key, so I can really impress any friends who get new computers... Anyone with an OEM 7 machine, please let me know if this fails to work for you, this is so ridiculously abusive of the system, I half expect it to be a fluke.