New commercial policy of Microsoft and PC manufacturers: It is no longer possible to know the serial number of the OS pre-installed. Result, if like me Windows is not able to find the reset system, you can not even Plusle make another disc. So for breakdowns that were once manageable without using the guarantee or service, you have no recourse other than to send your material, and wait several weeks for you to be returned. And I'm not talking about the charge when the warranty expires! Moreover, I issue of serious doubts about the quality of the components selected by Asus (though seriously until now): The hard drive has failed after a month of use. After drive replacement, this is now impossible to reset that will force me to return once again during the warranty year, my laptop. It really does not serious! I hope that Amazon will echo with Asus and other manufacturers, their discontent vis-à-vis customers of these new practices, ranging 180 degree customer interests.