How to backup and restore system partition by AOMEI Backupper?

Symptom: The "Boot error" message will show when the new file created in the bootable USB disk made by AOMEI Backupper. I don't know why it causes, so I choose another way. Here are the steps:

1. Download and install AOMEI Backupper (Standard Version).
2. Download and install Rufus.
3. Download ISO image from AOMEI.
4. Use Rufus to make a bootable USB disk with the ISO image.
5. Make System Backup file and copy to USB disk.
6. Reboot with USB disk and restore the backup file.