I have just upgraded my computer and completed a fresh (new) oem install of Vista SP1. It works fine until I install Eset Smart Security, after which I am completely unable to access the internet or even log on to the modem/router. It took me 3 days to narrow down the issue to being ESS, as disabling the firewall still does not allow internet access. Uninstalling ESS seems to solve the problem. I have uninstalled ESS for the moment, and am using Windows Firewall and AVGfree as a stop gap measure until I can resolve the issue. Anyone else experiencing similar issues? Suggestions?