Every now and then My DVD multidrive vanishes from my Toshiba Satellite Laptop 'My Computer'. If I place a cd or dvd in the drive when it isn't shown it does nothing. If I go into Device Manager and refresh or search for changes sometimes it comes back, sometimes I have to restart. When it is visable it plays and writes perfectly to CD and DVD. This is a pain and starting to become very frustrating. Any Ideas would be greatly appreciated.