So I gather that Smartware detects the drive but you cannot access it through My Computer?
Have you tried to format it?
What OS is the computer YOU use? If you are using Mac OS on your Computer that would be why it isn't working on the windows PC.
Fatal errors as in blue screens etc or do you mean you are getting delayed write errors when the hard drive is plugged in?
Have you tried using Smartwares diagnostics to check the drive?
Have you tried the drive in a different USB port? If you used a front port, try a port on the back of the PC.