I have recently had some problems with my computer. I use Mozilla Firefox for my internet (i have been for about a year now, and suddenly the internet has stopped working. I have a lan, and everybody else's is working. There is no internet at all, no aim, nothing. I have tried resetting up my internet connections, but they did not fix it. I am running Windows XP SP1 and when I try SP2 it screwes it up and i have to do a system restore, can anyone give me some ideas on what might have gon wrong?