Running vista. Computer froze, could not move mouse. I held the power button till it turned off. When I turned it back on my internet was no longer working. I have contacted my ISP multiple times and they have told me the modem and the connection works. So the problem must be the computer. The main issue, I believe, is under the local area connection, it keeps coming up as a unidentified network. It shows the computer being connected to a unidentified network, but the network is not connected to the internet. I have tried all logical basic solutions. The modem and connection worked on my laptop, so they are not the problem. it should say connected under the local area connection, but it only says unidentified network. Verizon (my isp) said it might be computer's network interface card (network adapter). How much are they, what if it is all connected to the motherboard. Thanks