I know every one want to upgrade to window 7 ultimate from window professional and still keep the license .So i would like to tell you some thing about this. Here is how we do: 1.Right Click My computer --> Properties. 2.You will see picture above --->Click on Change Product key and fill up with new key to upgrade and waiting. Or you can do like below start->search ->window anytime upgrade. These are not Product Keys they are antime upgrade keys( no product keys are needed!) Upgrade key for Windows Anytime Upgrade: windows 7 home premium RHPQ2-RMFJH-74XYM-BH4JX-XM76F Windows Anytime Upgrade Key windows 7 ultimate 22TKD-F8XX6-YG69F-9M66D-PMJBM Windows 7 Anytime Upgrade key: windows 7 professional VTDC3-WM7HP-XMPMX-K4YQ2-WYGJ8 good luck.
