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March 10, 2009
The HPS Virus, or Hantavirus Pulmonary Syndrome, is a Windows 95/98 file infector. Written by the same author of the Marburg virus, this virus activates every Saturday, when it horizontally flips all bitmap (*.bmp) files on the machine. Since a majority of Windows pictures are bitmap images, such as the startup and shutdown screens, this produces some interesting results.