In 2008, Negroponte showed some doubt about the exclusive use of open-source software for the project, and made suggestions supporting a move towards adding Windows XP, which Microsoft was in the process of porting over to the XO hardware. Microsoft's Windows XP, however, is not seen by some as a sustainable operating system. Microsoft announced that they would sell them Windows XP for $3 per XO. It would be offered as an option on XO-1 laptops and possibly be able to dual boot alongside Linux. In response, Walter Bender, who was the former President of Software and Content for the OLPC project, left OLPC and founded Sugar Labs to continue development of the open source Sugar software which had been developed within OLPC. No significant deployments elected to purchase Windows licenses.