I have the same problem with my wifes Acer, can't keep the wifi conection.
My Asus is working perfect, no problem, but on the Acer i even bought a new wifi module and after a fresh windows install with drivers from Acer i still have the same issue.
The problem is 2 weeks old. Until then everithing was fine. Nothing works ( new wifi module, fresh windows insta, latest and old drivers ) can it be from the motherboard?