The update "blends the desktop and the modern experience," Ballmer said, and includes the return of the start button (though not the Windows 7-style Start button that some people wanted), a boot-to-desktop option, and more.
In our hands on review, we found that while the interface tweaks may not appeal to everyone, the performance improvements should do, as Windows 8.1 feels feels generally snappier, even for simple tasks like compressing files.
But why take our word for it when you can download the Preview edition of the Windows 8.1 update free today? Here's how...
Head over to the Windows 8.1 Preview page Windows 8.1 Preview - Microsoft Windows
and click 'Get it now' and you'll download a Windows patch which, when installed, gives you an option to go to the Windows Store to download Windows 8.1.
You can then download and install the update in the background."..."