Microsoft got a cut-down version of Windows XP to work on the XO-1. When word of that came out, lots of people were very upset at OLPC, because of how heavily t

Microsoft got a cut-down version of Windows XP to work on the XO-1. When word of that came out, lots of people were very upset at OLPC, because of how heavily they had been emphasizing the open-source aspect of the project. IIRC, it never got farther than a tech demo, and no laptops actually shipped. It still generated bad press for the project, though.