We all know that Microsoft regularly releases free themepacks and wallpapers for Windows 7 users. Now Microsoft has also started releasing themes and Desktop backgrounds for Windows 8 and Windows RT. Almost all Windows 7 themes work perfectly in Windows 8 and Windows RT and Desktop backgrounds can be used in all OS obviously.
If you don't know how to download these official themepacks and wallpapers from Microsoft, check out following simple steps:
1. Right-click on Desktop and select "Personalize" option. It'll open a new window, now click on "Get more themes online" link:

2. It'll open official Windows themes page in your web browser. Alternatively, you can directly open the same page using following link:
3. From the above mentioned webpage, you can download various free themes, gadgets and wallpapers for Windows 7, Windows 8 and Windows RT.
4. Once you download the themepack file, double-click on it and Windows will automatically install and apply it.
NOTE: If you want to enjoy only the wallpapers included in these theme packs, you can extract the .themepack file using 7-Zip and you'll get a folder "DesktopBackground" containing all wallpapers.
PS: For your convenience, we are listing best and most popular official themes for Windows released by Microsoft:
Games Themes: Age of Empires Online | EA Sports 2010 FIFA World Cup | Forza Motorsport 4 | Fruit Ninja | Gears of War | Halo Reach | Microsoft Flight
Movies Themes: Avatar | Captain America | Harry Potter | Justin Bieber | Kung Fu Panda | Mission Impossible | Narnia | Rio | Shrek | Transformers | Paramount Pictures
Automotive Themes: Ducati | Ducati 2 | Ferrari | Infiniti Car | Porsche Car
PS: You can check out many other cool Windows 7 themes in our exclusive themes section:
Posted by: Vishal Gupta | Categories: Windows 7, Windows 7 Themes, Windows 8
Eric
where are the dinosaurs
Kevin
@ Eric - good to see I'm not the only one disappointed with the "Raptors" theme