Windows 8 launches on October 26. It’s been said to be Microsoft’s most important product launch to date. And Redmond is reportedly prepped to properly support the product with a massive marketing campaign. Forbes reports the campaign costs between $1.5-$1.8 billion, making it the largest product launch in the history of the industry. Microsoft has strangely been relatively quiet about Windows 8 so far. On the eve of its release, the company seems to be instead focusing on Bing and Internet Explorer 9 marketing. Read the full story at TechCrunch.