I still use a old Windows XP PC and a AT&T Aircard for internet. Was working last night when I got of of AgTalk and shut PC down. I show connected to internet and good signal but can't get any sites to come up. I use Firefox for browser. I am posting this from wife's pc that she connects to internet using her phone that uses same tower as my aircard does. She uses Chrome as her browser. I don't know where to start. Yes I know folks will say a new PC.