Hi: I placed one of PCs with XP in the back-room that is further away from Router/Modem Combo and most of time, ..... at the far right bottom, .... indicating, 'Signal is Low,' .... or the other time, 'No Signal.' However, I can access any web-sites as fast as the other PC with XP which is sitting close to Modem/Router Combo. It says, .... 'Signal is Excellent' If any of you could explain about it, I'd truly appreciate it. Thanks,