ACER M5620 Network Problem

Thanks for the reply on the ACER Aspire M5620 problems with the network.
I am wondering if my network adapter is just died? System can see it, but it always says cannot see the network, even if another computer works at the same line just fine?
It suddenly stopped working one day, I reinstalled drivers from Intel website, and still no luck. It can see local network, but does not allow access internet.
What else can I do?