Computer forensics, also known as digital forensics, is the process of collecting, preserving, analyzing, and presenting digital evidence from computers and other electronic devices. It is used primarily in legal investigations to uncover and document evidence of criminal activities, data breaches, or unauthorized access. 

This process involves recovering deleted files, analyzing system logs, identifying malicious software, and tracking digital footprints. Computer forensics experts ensure that the integrity of the evidence is maintained so that it can be used in court or other legal proceedings.