windows 7 ultimate : this is the most versatile and powerful edition of Windows 7. It combines remarkable ease-of-use with the entertainment features of Home Premium and the business capabilities of Professional, including the ability to run many Windows XP productivity programs in Windows XP Mode. For added security, you can encrypt your data with Bit Locker and Bit Locker To Go. And for extra flexibility, you can work in any of 35 languages. 

Jump Lists - With Windows 7, Microsoft focused on keeping the things you use most right in front of you. One example: The new Jump List feature. It's a handy way to quickly reach the files you've been working with. To see the files you've used recently, just right click on the icon on your task bar. So right-clicking on the Word icon will show your most recent Word documents. Plus, if there are other files you want to keep handy, you can just pin them to the Jump List.

Improved taskbar and full-screen previews - The task bar at the bottom of your screen is what you use to switch between the applications you've got open. In Windows 7 you can set the order in which the icons appear and they'll stay put. They're easier to see, too. Click once on the new large icons or bigger preview thumbnails and you're ready to go. You can even see a full screen preview before switching to the window.

Internet Explorer 8 - With innovations to the address bar, search, tabs, and the Favorites bar, Internet Explorer 8 brings you more information, with less effort.

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