I am taking it, that the fatal error
comes from the software side. Is the fatal error
a blue screen fatal error, or is it a program crash? I assume you are putting your doc in the machine, and actually scanning from the computer? Or do you push a button on the copier to scan? Either or, are you getting the error on the computer or copier (most copiers don't have that message, but I have to ask)? If so Sometimes removal of the scanning software, and reinstallation of the Latest and Greatest, will usually take care of most printer/scanner problems on the computer side. The Latest and Greatest, is available at the hp website.
Also, I would have you're vista os examined for malware/spyware, as those tend to be problems in themselves, and yea reinstalling the latest and greatest may take care of your immediate problem, but with mal/spyware, you might have more problems down the road.
(edit for spelling/grammer)
Edited by st0ll3n, 27 April 2009 - 07:32 AM.