According to this article http://arstechnica.com/microsoft/news/2009/06/microsoft-currently-asking-45-to-55-for-windows-7-starter.ars http://arstechnica.com/mic

According to this article http://arstechnica.com/microsoft/news/2009/06/microsoft-currently-asking-45-to-55-for-windows-7-starter.ars http://arstechnica.com/microsoft/news/2009/06/microsoft-curr... which is a bit dated it seems like the cost of windows could be as low as $15-30.