Recently, our wireless router stopped getting an IP from our cable provider. I tried lots of things but ended up borrowing a wireless router from a friend. I got the router and connected it and everything was fine. Great, even. Then I brought home my work laptop. It wouldn't connect. Then my wife's laptop began having wireless issues. It would drop pings and network traffic would drop to nothing. I tried adding a guest wireless on the new router and that worked for a short time. I tried my wife's old laptop (Dell XPS 1330) and had similar issues. So three different Dell's and two of them exhibit the same problems.
I have been wrestling with this issue for a week now. I have updated drivers on the wireless card. I have changed settings on the router. Reset the router numerous times. Last night I spent an hour+ updating the firmware on my old router and connecting it. Same behavior. If I connect the laptop via a cable it works perfectly. No dropped pings at all. I can watch it drop pings on wireless, connect it with a cable and watch it hit ever ping perfectly at 50ms, disconnect the cable and turn wireless back on and it drops pings again. I have run antivirus on it numerous times. I have taken it to work and connected it via wireless and it works fine (granted I only had it connected for an hour).
Currently My wife's laptop is showing that it is connected at 160mbps (sometimes it goes up to 300). If I run speedtest it won't even start. If I connect to another computer on my lan the speed looks like a roller coaster.
During all of this every other non-Dell device in my house has worked perfectly fine. My macbook was fine. My desktop (built) connected via a tp-link wirless usb adapter was fine. My son's computer (an old self build) connected via an old wireless G network adapter was fine. Two ipads, a kindle fire, two nokia phones, a blu-ray player. Not one of them exhibits this behavior.
At least two machines (a dell new dell inspiron 14 with a core i5 and an older XPS 1330 with a Core2Duo) exhibit the same behavior. From what I can tell they only exhibit this behavior at my house but do so with at least two completely different wireless routers (newer d-link and an older tp-link).
I don't get it. Does anyone have any ideas?