Possible Clues:

• Bug first discovered in 1898
• Organism causing disease, or malicious program in computer
• Morality half rejected by American agent with bad influence
• Microscopic entity capable of reproducing within cells
• Computer crasher
• Submicroscopic organism, cause of disease
• Game produced in volume is a horror on computer
• Infectious particle
• What may kill your computer - see one run unserviceable
• Particle injurious to people (or computers?)