I tried to install Rosetta Stone language software and when i did the hard drive would spin up read for a second then spin down. it would then act like the power was off then spin up again for a second then spin down. it said total install time was 220 hours because it kept spinning up and shutting off. eventually i used an external cd rom drive and installed it in 6 minutes. so im just curious if something is wrong with my cd rom. i tried to reboot and it was acting the same way. I watched a dvd and it seemed to work ok. so im not sure why that was happening.