Complex sentence: It was discovered by NASA onboard a computer in International Space Station on August 2007 though the virus did however not pose any threat to the ISS as it is a gaming virus made to steal login information for net-based computer games.
Split into simpler sentences: It was discovered by NASA onboard a computer in International Space Station on August 2007. The virus did however not pose any threat to the ISS as it is a gaming virus made to steal login information for net-based computer games.