My o/s is Vista. For some time now my windows media player has not been working. When i try to watch an MPEG file, i get two error messages. One error message is "COOD11B3"-NETWORK ERROR. Another error says that file cannot be found. These files are mostly <5mb in size. Has anyone encountered this same problem? If so, do you have a solution? Or is this just a case of Microsoft producing inferior products and not helping consumers with a great multitude of problems with their over-hyped and inferior products once they are purchased?