My Book Essential 2.0 Makes Windows XP Pro Hangs At Boot Up

Sorry, Joe, can’t give you kudos for the answer because it didn’t work.  Windows showed a delayed write error for the bad external drive when I re-connected it so I could delete the driver.  I left that bad drive disconnected at reboot but connected the new one. Windows still hung at a blank screen.  I had to disconnect the new drive, restart, and then re-connect the new drive just before logging on to Windows.  With Windows XP, the driver for the bad drive disappears from Device Manager as soon as it’s disconnected anyway.  The driver showing is for the new one.  I even updated the MB BIOS and updated the MB graphics drivers accelator and it’s speeded up my computer but reboot still hangs with the drive connected. I’m not sure if anyone knows the answer to this problem and I’ve never come across it before.