We have just got a new Dell Studio 15 laptop running Windows 7 home premium with slot load DVD drive. If there is a DVD drive in the drive, every minute or so, the drive will spin up, make a couple of noises like it is reading something and then spin down. I think this is ruining battery life. There is no software running that is obviously accessing the drive. Any ideas to what it could be? Are there any tools I could use to try and identify the problem? Thanks.