Comment by d--b

I had one of these myself. WiFi wouldn’t work when my wife was using her laptop in bed. As soon as she gave it to me, it started working again. She thought it was the magic touch of the engineer, but it turned out that when she was in bed, she pulled her knees up and set the computer on her lap, while I would lay down completely and let the computer rest on my chest. Her knees blocked the WiFi signal enough to be quite noticeable.