The X-Virus is a virus. Dr. Tim Shimizu is viewing it on a microscope, but what is visible on the screen is bacteria.
The X-Virus is supposed to have been derived from a form of malaria. Malaria is a parasite, not a virus.
A portable computer is in Mr. Harper's office. These computers were specifically designed for use where the user has to travel to different locations, and it is far more likely that Mr. Harper would have a desktop computer in his office.