Unlike all radiant quests in the base game, this quest completes and reward is dispensed immediately upon destruction of the target, as opposed to requiring the player character to return to the quest-giver for reward and completion.
Not unlike other radiant quests, the Mechanist will sometimes say that she can't find any new signals and the player character should wait. To get around this, just talk with her again.
Codsworth, Piper, Nick, Curie, Hancock, Strong, Deacon, Danse and Preston like accepting this quest.
Sometimes the robots will be attacking settlers, and if the robots are killed before the robots kill the settlers, the settlers may be recruited. This most often occurs at Fort Hagen satellite array and Hangman's Alley. Since the settlers can then be sent to any settlement of the Survivor's choice (barring Home Plate), regardless of the maximum population, this quest can be exploited to increase the population of a settlement indefinitely.
Ada only gives this quest if you kill Isabel at the end of Automatron.
pc Sometimes after killing the rogue robot, the quest will not complete and it will stay in the Pip-Boy. However, it is possible to talk to Ada again and after exhausting all other dialogue options, she will give you another quest which can be completed.[verified]
Running to following console commands on PC will resolve the issue: