Microsoft
Windows 8.1 64-bit (Full Version) - OEM
Windows Reimagined
Windows 7, only better
Behind the new look of Windows 8.1 is the rock-solid foundation you've come to expect from Windows 7. Immerse yourself in the exciting features of a new generation of PCs while enjoying the full power of Windows. In addition to the new look of the Start screen, Windows 8.1 incorporates the desktop that you're familiar with. Think of the desktop as one of the many apps you can run in Windows 8. In the desktop, you'll see all the settings, devices, and features you used in Windows 7-and you can run the desktop apps you ran in Windows 7, too.
Just like Windows 7, security and reliability features are built into Windows 8. Everything that was great about Windows 7 is even better. For example, you can sign in using a text password, or you can create a picture password using gestures on your Windows 8.1 touch screen.
The new Start screen
The new Start screen has all of the information you care about in one place, such as your contacts, the weather, and the next appointment on your calendar. Windows 8 is truly yours: websites, playlists, photo albums, contacts, and your favorite apps are front and center. Because you decide how to organize and group things on the screen, viewing and interacting with content is faster than ever.
Touch, keyboard, and mouse: seamless integration
Windows 8.1 is hands-on and designed to eliminate the need to choose. You don't have to "work" on your PC and "play" on your tablet. The most efficient way to get stuff done is immediately available. Whether you're browsing apps, reading a book, or typing on the go with touch, creating a project that requires the more productive horsepower of a traditional mouse and keyboard, or doing everything at once, Windows 8 makes it easy. You use whatever works best, whenever it works best. No tradeoffs.
Your Windows everywhere
Sign in and your Windows 8.1 device becomes yours because your personalization, desktop background, and settings are all there. Whether you set it up once just the way you want it or change it often, when you sign in even a brand-new PC lights up with everything that makes Windows yours. And anyone you share your Windows 8.1 PC with can have their own personalized, cloud-connected access by signing in with their own Microsoft account.
Start a project on one PC, and finish it on another. When you use the cloud to store your information, the boundaries between devices dissolve. Your apps, games, music, photos, files, and settings aren't stored on one device because they're in one place: the cloud. Sign in to any of your Windows 8.1 PCs and access all of your stuff from virtually anywhere.
Built-in apps
With Windows 8.1, your entire PC is cloud-connected. You'll have new Microsoft Mail, Calendar, SkyDrive, Photos, People, and Messaging apps that are connected to services like Facebook, LinkedIn, and Twitter just by adding them to your Microsoft account.
With SkyDrive, you don't need to worry about being able to access your documents and photos on other PCs because when they're in SkyDrive, you can access them from any device with an Internet connection.