Asus Vivobook Problems

[king1]

if the wifi card is disappearing from device manager then I might be inclined to think that is a hardware fault, I had to replace the wifi card in my laptop a while back for the same reason, although mine was still present in device manager when it failed.
Mine was an Atheros wifi card which seemed to have a few issues from what i read, so i replaced it with an intel one, seems to have resolved my problem...