It almost a week now my system is not working fine. I had started a download which stucked in between. I am not able to understand where the issue lies. It is with the router or with the system. Vista shows up limited connectivity. Sometime it is not able to recognize the network entirely. It is very annoying and sometime it is stucked with limited connectivity. Sometime there is unknown network. I had tried to plug and unplug the same a number of time but still it is not working. I had checked ipconfig /all there is nothing listed.