Windows 8: Taking a look at Microsoft's latest operating system
1 June 2012 Last updated at 18:10 BST
Microsoft has launched the most complete preview yet of its forthcoming Windows 8 operating system.
The company said that tens of thousands of improvements have been made to what it calls the most important redesign of its interface since Windows 95.
Rory Cellan-Jones installed it on a Samsung tablet, to get a sense of how the system functions on a touchscreen platform.