If you still have Windows 7 and want to make Windows 7 look like Windows without installing Windows 8 then look at this tutorial. http://www.askvg.com/download-windows-8-rtm-theme-for-windows-7/
Follow the instruction and you can make your Windows 7 look like Windows 8.
Note:- Remember that I have found this trick. If you have any question then post it on given link and I am sure they will help you.
Thanks for read my post