Wireless router's signal are succeptible to radio interference from devices such as microwaves, wireless phones, cell phones and anything else that sends out radio wave signals. Magnets too close to the router can also affect it, as well as walls and possibly big fat mosquitoes.
The fact that you changed position which dramatically affected the signal shows that there is possibly some interference. Temporarily turn off all those devices, change position and tell those aliens outside your window to scram:) Make sure too that the configuration on your utility page is the same as your girlfriend's laptop.
I don't know a whole lot about networking or wireless, and I assume I have what is a very basic setup - modem to router to laptop (Vista). I've never really had problems except for the occasional blip here and there.
But the other day, I was using the laptop, and all of a sudden the internet stopped working. It wouldn't show any connections at all. Sometimes when I refreshed a list, a network would show up (not mine), but I could never connect to it. I refresh again, and it can't find any networks. And yes, the wireless was turned on.
My girlfriend also has a laptop, but there are no problems with hers, so I assume it's not the modem or router causing the problem.
Anyway, it was really frustrating me, and I could figure out what was going on. I finally solved the problem accidentally - by standing up. When I stood up, it almost instantly reconnected to my network and all was fine.
Today though, the same thing happened. No networks, other than the occasional one that can't be connected to. Girlfriend's works just fine. I've tried unplugging and restarting the computer, modem, and router, which didn't help.
Does anyone have any ideas? What could be wrong? And why does it stop working so suddenly? Nothing has been changed... it just stops.
Thank you for any help you might have.