Four new Microsoft ads for Windows 8 have leaked online. The standard game of 'cat and mouse' has already started with Microsoft having YouTube remove said ads due to copyright considerations and other users posting them back up soon thereafter.
That said, try and catch these while they're hot.
This one is called "Make it Yours"
The next one is called "Work hard Play hard"
And next we have "Meet Windows 8."
And finally we have "All About Apps."