from what i have read, the route to restore stock windows for windows 8 is somewhat complicated than i thought
😕1. we have users reported that Ai Recovery is missing for win8 models (phased out);
2. system image created from windows 8 can only restore into disks with the same or large sizes (not smaller, unfortunately).
edit: and i'm not sure if plain cloning is useful; windows 8's secure boot feature might need to be disabled first.
the last resort would be getting a windows 8 install disk and do a fresh install and grab the drivers from
ASUS's download page.