Explore quantum error correction in this comprehensive lecture by Serge Rosenblum, part of the "Condensed Matter Meets Quantum Information" program at the International Centre for Theoretical Sciences. Delve into the crucial topic of maintaining quantum information integrity in the presence of noise and decoherence. Learn about various error correction techniques, including stabilizer codes, surface codes, and topological quantum error correction. Understand the principles behind protecting quantum states, detecting and correcting errors, and the challenges involved in implementing practical quantum error correction schemes. Gain insights into the latest advancements in this field and their implications for building large-scale, fault-tolerant quantum computers. This lecture is essential for researchers, students, and professionals working at the intersection of condensed matter physics and quantum information science.