Just had a problem with my WD external hard disk. It stopped working all of a sudden. The light on the drive is on, the 'Safely remove' icon shows up in the notification area, but the drive is not shown under 'My Computer'. I don't think thta the disk is spinning inside the drive; I can't feel anything by touching it. The letters WD appears under Disk Drives in Device Manager. It can't be seen in 'Disk Management'. I tried it on many other computers, with the same result. What is to be done?