This morning i woke up to my screen saver, saying it couldnt pictures in "F:My Documents.....". I unpluged the EXT HDD and restarted the computer, came back up worked fine that was around noon today. Just now i went into it to look at one of my pdf's and i cant get it to recognise the drive. I unplugged it restarted it, plugged it in and restarted it, swaped USB cords out. Nothing. The computer recognises other USB keys but not the MyBook. Any ideas.