Update to Windows 8.1 from Windows 8/ RT

  1. Before you begin
  2. Prepare your PC
  3. Get the free update
  4. Restart
  5. Choose your settings
  6. Welcome to the new Windows

Windows 8.1 and Windows RT 8.1 build on Windows 8 and Windows RT, to bring you enhancements in personalization, search, apps, the Windows Store, and cloud connectivity, and has the security and reliability features you expect from Windows. It's fast and made to work on a variety of devices—especially on the new generation of touch devices.
If your PC is currently running Windows 8 or Windows RT, it's free to update to Windows 8.1 or Windows RT 8.1. And unlike previous updates to Windows, you'll get this update from the Windows Store.

1. Before you begin

The system requirements for Windows 8.1 and Windows RT 8.1 are nearly the same as the requirements for Windows 8—if your PC is already running Windows 8 (or Windows RT), in most cases, you can get the free update to Windows 8.1 (or Windows RT 8.1).

But before you begin, here are some things to keep in mind.

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© 2013 Microsoft Corporation

The entire tutorial can be found at Microsoft - Update to Windows 8.1 from Windows 8 - Microsoft Windows