Hello, i'm here to remember to all users that are in process of using this tutorial something important. This "boot up optimization" will be the cause of creation of a lot of useless files in your "Prefetch\ReadyBoot" folder. Those files will be created/renewed every system bootup, and will be fragmented exponentially from time to time. Those files have the extension *. Avail, *. Dqpafm, *. Dqpafmsg, *. Dqpa, *. Dqpaf. I have asked some time ago @ the autor of this topic how to reverse this behaviour, and he simply doesn't have any idea how to do that. I was forced to reformat to fixing my OS. I suggest to anyone who wants to cut some seconds to the bootup process, to open cmd and paste this string: rundll32.exe advapi32.dll,ProcessIdleTasks This is totally safe for your OS, no bad surprises as the method here posted. Goodbye.