If you want to back up Hotmail Emails without any mistakes, you need to use proficient software. In this regard, I suggest trying Softaken Hotmail Backup software. Some time ago I tried this tool to back up & then save the Hotmail emails into several file formats like PDF, PST, MBOX, and so on. This utility was very helpful & provides a simple user interface. Thus the software is appropriate for non-technical users as well. This software is loaded with advanced features to provide the best backup experience. Refer: https://www.softaken.com/hotmail-backup-pro