[kirennia]

If the router is still working and people can't connect, try this.

Settings --> Control Panel --> Network Connections.

Right click on the appropriate network, goto properties. In there, you'll note a client box ticked and your internet protocol TCP/IP ticked as well.

Untick both of these, click okay and wait for a few seconds. Then go back in and re-tick them.

It's surprising how many network issues it fixes. The problem is that recently there was some really weird worldwide bug where a large portion of routers had a funny turn and returned corrupted addresses to all computers on the network. This simply gets rid of that address and puts back in a new one.

If they're running Vista, it's a similar thing whereby you'll have to search around to find the ivp4 and ivp6 addresses but once there, do the same thing. Untick them, click ok and go back in and retick them.

Let me know if it works or not.