I've recently bought this laptop and am very saddened to hear the amount of complaints about the wifi problems. I've spent a week downloading new drivers, old drivers, tweaking settings, doing everything anyone appears to have tried on Google and I still suffer problems.
To sum up, my laptop connects very sporadically to a medium strength wifi connection when on AC power. It seems to connect well on battery power. This shouts to me design fault..
All other devices from laptops to phones to iPads have no issue anywhere in the house. I've changed channels and rebooted the router etc etc.
If anyone has advice please get in touch.