I have a trouble about my wireless router signal. My laptop is 25-30 feets (about 8 meters) away from the router. Between them there're 2 walls. Windows reports signal strength is two bars, and inSSIDer tell the RSSI is about -77 to -80. The speed is good, youtube works flawlessly and I measured it reached the maximum bandwidth.
But periodically, the signal strength drops to -90 (according to inssider) and of course the speed is horribly slow .Then it begins return to normal. That's wierd, I don't change anything: the laptop position, the lid... The router aint hot, nobody touches it, and my sister checks facebook and twitter doesn't seem like a reason. I also choose channel 8, my neighbors don't use it. So I think no conflict here.
I search the internet and found a case like me here
So I need your ideas how to fix it