If you ask me, every software patent should be invalid. However, what matters is the opinion of the courts, and the invalidity of that patent has never been proclaimed there. MS is successfully extorting money from most Android hardware manufacturers in the world because of that patent. Even B&N settled with them (http://www.inquisitr.com/227573/micr...-barnes-noble/). MS wouldn't be getting all that undeserved money if their ludicrous patents were so easily invalidated.