Computer data recovery is the process of retrieving lost, deleted, corrupted, or inaccessible data from computers or storage devices such as hard drives, SSDs, or USB drives. This can involve specialized software, hardware tools, or professional services, depending on the cause and severity of the data loss. Data recovery is commonly used after accidental deletion, hardware failure, malware attacks, or formatting errors. It's important to stop using the affected device immediately to prevent overwriting the lost data, which increases the chances of successful recovery.