I bought a new computer which has Vista and a wireless modem. It worked perfectly until 3 months ago when every 1-2 days the Internet and Email will suddenly stop working and give error message such as page cannot be displayed.
But I can ping, the network and sharing centre still says I am connected, including the little 2 computer icons at the bottom right and says I have an excellent signal etc, I can still use my laptop via the same modem at this time. The only way to fix it is to restart my computer. When having this problem, my laptop can see my computer but my computer can't see my laptop.
I contacted my ISP who said they can't help me as it can't be a modem problem. I contacted Dell who told me it looks like it is a software problem (which I don't have warrenty for) but put me through to a Dell software guy as a good will gesture who told me the modem is hanging and to switch the computer off at night but this didn't work.
I reinstalled my modem drivers twice. I uninstalled my anti-virus (which does give me other problems). I also reinstalled Vista (I didn't reformat - just replaced the Vista files). I also tried turning my modem off at night and resetting my modem when the problem occurred. I clicked the diagnose and repair button which tells me either there is nothing wrong or it pinged but did not receive a response (even though I did). Sometimes it said trying to repair but couldn't or removing the malfuncting network component.
I didn't know whether the problem might have had something to do with the Wireless Network Connection Properties? I just noticed when I have the connection problem the Uninstall button for the Link-Layer Topology etc and Qos Package is greyed out, but when the connection is ok, it isn't greyed out but I have no knowledge about how they work or whether they could be the problem.
A TCP/IP address is obtained automatically and the DNS is Automatic from ISP. I have WPA2 security and password protected. When the problem occurs I also can't get into the modem router page (http://192.168.2.1) etc either.