[94_AcCoRd_EX]

I don't know of a way to do that unless you do a system restore (I think that would do it). Yeah, obviously not the ISP then.

Do you have some more info on the optimizer you used? I doubt that's a problem since you've been using it though.

If I was having the problem, I'd start by looking at all of the network settings. Make sure DHCP is on (assuming you use it), privacy setting are set to let all traffic through, router settings are normal. I know its a pain though. Maybe someone else will have some suggestions.