OK, I know a way to get Windows Ultimat and Microsoft will think its completely legit!
First you have to go to a store, where Windows Ultimate is sold, find a copy and pick it up. Move to the back of the store, put it on a random shelf. Jump up and down 5 times and do a spin, make sure the employees don't see you or they might think somethings up.
Then go back, grab another copy and pay for it.
From here you get in a method of transport of your choice and drive back home and sit on your computer.
Put the disc in the tray, MAKE SURE THE MICROSOFT LOGO IS CLOSEST TO THE PC, this is crucially important!
Boot from the disc, and use the product key in the case to install Windows. When its done, validate it.
There you now have Windows Ultimate and Microsoft thinks its completely legal, they'l never know you jumped up and down in a store.