The virus is a computer virus that Hacker uses in "Lost My Marbles" to try to dispose of Motherboard. It invades her circuits, and she suffers partial damage. Curing Motherboard of the virus is one of the CyberSquad's primary goals throughout Cyberchase.
Dr. Marbles seems to have access to this virus as of "Step By Step", where it was stored on a memory chip. He had infected a duplicate of Motherboard's circuit board to experiment with using Magmalux to neutralize the virus.
Physical appearance and behavior
The physical form of the virus is a swarm of large, textured, glowing golden yellow-green particles that are fired at the press of a button in the Grim Wreaker. In the original version of the title sequence, the particles of the virus appear to materialize out of nothing.
In the title sequence, the CyberSquad uses a cyberpod to reflect the virus towards the Grim Wreaker. The shattering effect on Hacker and his henchmen's startled reactions may imply that this harms the Wreaker.
The virus has had various negative effects on Motherboard. Her speech is often interrupted by bursts of static and other malfunctions. Inez suspects that the virus is also what causes Motherboard to talk in riddles.
The virus can even weaken Motherboard to the point that she enters sleep mode.
While using the early model of the Encryptor Chip in "Fit To Be Heroes", Motherboard says that her hard drive is functioning at full speed, and that she can see Cyberspace as she once did. This implies that the virus affects these functionalities as well.
When the virus corrupted Motherboard's operating system, it also destroyed the safety lock of The Emergency Reset Button.
Hacker has an antivirus code. He once gave the CyberSquad a small portion of this antidote, which he later privately revealed would wear off.
In "True Colors", Hacker claimed that the virus could be cured with a triangle lock mechanism, but this was proven to be a lie.