This microlecture, 'Refining Your Capstone Focus & Responding to Cyberattacks,' guides students through the pivotal Week 4 where they narrow down their three potential thesis topics to one for preliminary approval. It outlines criteria for topic selection, addresses when and how to propose a new topic, and emphasizes the academic and professional growth derived from these decisions. The lecture also introduces the Short Research Proposal and the Cyberattack Response Presentation & Technical Brief assignments, providing essential context and tips for tackling both topic formalization and practical cybersecurity response planning.