Generally this sets up a dual boot option and installs a WinPE partition on your boot drive. The AOMEI program on the WinPE partition has two options: 1. Create a system backup image somewhere. 2. Restore from an existing system backup image.
So why use it? On PC's being operated by individuals unfamiliar with these types of backup and recovery. No need to create boot media and/or fool around with how to boot from that media.
The free version does not allow the second option.
I'm new to using this but this is what I see happening.
Either choice you make creates an AOMEI boot partition on your main boot drive.
After the image is made and stored you will be given an option of enabling an F11 option upon boot up to access the AOMEI PE environment. The default message duration is 3 seconds. This is not enough but maybe 5 seconds will work. Also be aware that your PC may already have an F11 hot key to access the BIOS boot menu and you would need to wait to get past that. It can be confusing.
If you need to correct the duration.
The amount of time the F11 option shows can not be changed after initial setup (I don't think).
But the Windows dual boot selector is standard BCD stuff.
Really, the F11 setup is a non event. If this is set up for novice protection, the F11 will just complicate his life. You will have a dual boot setup and the option will present itself.
1. Boot into Windows
2. Boot into AOMEI
Just make sure the option is presented long enough to allow a normal human to make a selection.
Second Win7 PC would not install. I started the process and then would reboot into Windows repair.