My laptop could not connect to internet thr...

This is what happened, I left my laptop (Acer Aspire 4520) hooked-up to the phone even when I wasn't using it. Then one day, there was a lightning storm in our place and then, after one flash of lightning, our phone went dead. My laptop was turned-off when this happened.

It took a couple of days before a guy from the phone company was able to restore our telephone line so it was only then that I discovered that my laptop could not connect to the internet through my dial-up modem anymore. It would simply say ''Failed to connect to <name of internet provider>'' then a list of task to choose from would follow (eg. Diagnose the problem; Try again; and Try a different connection). When I chose Diagnose the problem, it will say that Windows did not find any problems with this computer's network connection (I'm using Windows Vista Home Basic).

What could be wrong with the laptop? By the way, I've tested it's LAN card and WiFi and they're both functioning normally.

I sure hope you could help me. Thanks!