My main PC (Windows Vista Premium) is connected to the internet via an ethernet cable to a router etc. It has been fine p until now. Router is working fine and has green lights for everything. However can not connect to internet. If I turn on my laptop which has a wireless Bus Card it connects to the internet fine via the router. So was wondering if any one could suggest a way to rectify the problem via the PC ?? Could it be the AV software ? I guess doing a system restore might help ??