The upgrade

"The Upgrade" is an upgrade of the Bioweave, built by the Imperium, to ensure that the humans do not rebel.

If you touch any Imperium technology "The Upgrade" is automatically downloaded and put into action. The effect would turn the person into a mindless slave of the Imperium. This effect was used on Del most effectively.

Many of the upper class of the Imperium, we're not affected by this, due to them not wanting to lose their free will.