To communicate the new version of the world's most used browser, Microsoft sent its product to the streets. A guerrilla campaign called "LostNotebooks" - forgot notebooks with only IE9 installed and with 3G Internet in various parts of the Country's largest city. As if their owners had left them in the location, the notebooks surprised passers-by with the apparent carelessness. Intrigued, the people who noticed the notebooks interacted with them.

Notebooks were scattered throughout São Paulo, as if they'd been left there by their owners. In each of them, only IE9 had been installed and with 3G access. An application created especially for the project automatically took pictures of each user, encouraging posts on social networks.

• 7 million pageviews • More than 3,000 quotes in social networks • 1000% return on spontaneous media.