Hi
There actually is a utility to create a system image in Windows 8.
They just hid it and gave it a strange name.
Look in Control Panel for an Icon named Windows 7 File Recovery, it's actually the Windows 7 app to create an image file.
It will make an image of you OS drive and it will ad it as an option if you use Windows recovery.
It will also let you create a bootable Windows repair disk in case you can't get into the normal recovery window.
I'd still recommend making a system restore using Paragon Backup and Recovery or a similar program.
I use Paragon and it's save me several times.
Mike