wireless network not connecting

Just this week my wireless internet has gone down the pooper. The computer that is hardlined into it still has great internet, all the other computers cant even find the network, and if it does, it wont load anything very quickly if at all. The router is a Netgear N300 WNR2000. I have tried turning it off and back on, unplugging the wires and plugging them back in, using different ports, and nothing has worked. any help is greatly appreciated. Thanks!

I have also the same problem, my router is Netgear N300 WNR 2000 , i just bought it and my other computer and lap tops are working good on it, but one laptop which has vista on it, is not detecting the wireless or wired internet.
help plz

Difficult one to solve without knowing exactly how your network is setup. If this were me, i would buy a new router

well i happened to find my old g router. plugged it in and internet works again. router is bad.