I have recently purchased a brand new Toshiba Satellite M305D-S4830 laptop that is running on Windows Vista. Now the problem with this laptop is that its dvd drive keeps disappearing. Even, when it will work, and then i will try to open up device manager and after a refresh it will again disappear? There is no error message given and it is unable to eject as well when the drive is gone? After a restart the dvd drive comes back again but not for a long time. Can anyone help me with this issue? Thanks.