Supporting so many networked PCs would be so much easier without the hassle of users!! To give you an example of the some of our user's intelligence levels, 17% are known to use the CD tray as a coffee holder, 53% believe it's on just to turn off the PC when they go home at the end of the day and an amazing 5% have been known to insert floppy disks into the CD drive (the trayless variety) and bizarrely, when they they find that the floppy isn't working, use something to physically push the disk further into the CD drive, in some cases, breaking the head off and ruining the drive!!