UPGRADE Windows 7 !

Go to start menu type in search box "Windows any time upgrade"
OR
right click COMPUTER and click properties!
There you can see windows logo and its version and below it "Add features to windows"

And a window opens!Now click on ENTER PRODUCT KEY!


Windows 7 Home Premium:
★★RHPQ2-RMFJH-74XYM-BH4JX-XM76­F★★

Windows 7 Professional:
★★VTDC3-WM7HP-XMPMX-K4YQ2-WYGJ­8★★

Windows 7 Ultimate:
★★22TKD-F8XX6-YG69F-9M66D-PMJB­M★★

AND U R DONE!
It will take time upto 10 minutes and will restart once!
and now you are welcomed by new windows 7!