I have an xp box that is connected to a cisco router, which is connected to a linksys router,which is connected to a cable modem. My xp box has no connectivity issues at all. When I try to connect a Vista PC to my Cisco router, it will connect to the network but can't access the internet. I have tried with 3 different vista PC's. When I move the cable from my Cisco router to the Linksys, I connect to the internet right away. What could be in my router config blocking vista but not xp?