In some media resources, e.g. at the website of the official austrian media station ORF (http://futurezone.orf.at/produkte/stories/155581/), it was announced that OLPC is performing a strategy change and that a version of Microsoft Windows will be the offical standard software system that runs on the OLPC laptops. This is not true, as it is already described at the OLPC myths page. The OLPC is continuing to develop a Linux-based software set for the laptop in conjunction with RedHat.
On the other hand, Microsoft is working on a Windows based system that can be executed on the OLPC laptop. Some additional information about the OLPC Windows version might follow here.