Virus (1999 film)/Headscratchers

• The virus is apparently an electricity-based lifeform able to sustain itself indefinitely, yet it is "killed" when the ship it's in is turned off, or when the robot it's controlling is destroyed.
  • Power requirements. Running a "host" without external power is a Cast from Hit Points situation--the virus has a choice between going into hibernation or using itself up to keep the system going.
• Also, why does the virus need us for spare parts if the far superior machine it eventually builds was made without our "help"?
  • Obviously, it cannibalised the organic parts it needed from its other robots.