I purchased a new laptop with win7 home oem. I immediately purchased a full version of win7 ultimate which I installed and am running. I am building a new desktop. I want to install the win7 ultimate (64) on the new dt, and revert to the oem win7 on the laptop. How can I clone one onto the other? Once that is done I would then format the laptop, and do the activations.
Did you backup the Win7 Home to another HDD, or do you have the disk?. If so, just backup any data you want, then re-image/install Home premium to it. If you haven't got either, you will have to contact Microsoft/Laptop manufacturer for another copy of Windows to install on the same product key (should be fine since its the same mobo).
As for the Win 7 Ultimate on the desktop, your best off with a fresh install. Since the Ultimate isn't OEM there shouldn't be a problem with installing it.
look on your laptop support to see if there was a restore partion on the laptop.if it still there all you have to do is power up and hold one of the f keys to start the system restore. if not it a small fee to get a set of restore disk for a vendor.