Why can't we connect to the internet?

My fiance and I are on a small home network (cables, not wireless) and suddenly her pc can no longer access the internet. We are both connected to a router, which is then connected to the modem. I've attempted resetting the network, repairing our network configurations, etc multiple times to no avail. Her computer even seems to claim that her network connection is fine and yet it still has no luck when trying to access websites. Any advice?

Why can't we connect to the internet?virus scanner

yes check if dns is working by doing the following:

1. open upa dos window

2. type in nslookup

if you get back a default server (which I think you won't) then you need to make sure that the network card is set to dhcp or if you set manually that the dns server IP is correct

I would also check the routing table (netstat -rn from a dos window) and compare to the routing table on a working PC (teh default gateway shold be the same, IP should be different)

also check to make sure that the non working machine has a valid IP address for your network (ipconfig forma dos window)

if it doesn't try releasing the dhcp lease and renewing it (ipconfig \renew all from a dos window) assuming you are using dhcp (which you should do unless you are good with networking)

dougc

Why can't we connect to the internet?anti virus software

This happens sometimes, try unpluging the power cord on all your devices (modem, router. etc...) and wait a minute, reconnect them in order by plugging in the modem 1st then the router, and then the settings will be resetted
make sure dns setting are correct. U should check with yr isp whether they have any maintenance or not.
make sure all lights on modem are green. You could try plugging in the modem directly into a computer to see if the problem is from your ISP or your router. If all else fails, that is what calling your isp tech support is for.