Microsoft has launched its first advertisement for new operating system Windows 8.1, titled 'Windows 8.1 Everywhere'.
The 30-second ad was uploaded to Microsoft's YouTube account and focuses on the usability of the OS.
Microsoft said in a statement: "Windows 8 customers can update to Windows 8.1 for free in the Windows Store, starting October 18th, 2013.
"With the return of the Start button, new ways to personalise your Start screen, and more ways to do more things at once, the new Windows gives you one experience for everything in your life."
You can watch the Windows 8.1 ad here: