I am in a network, where my laptop works in all other routers except my room's router, whereas other's laptop/PC supports my room's router. Please answer soon I'm out of the network. However, I'm now in same network, coin another router. Thanks
Go into Control Panel>Network and Sharing centre and delete your LAN connection completely, then restart the laptop and see if it reconstitutes itself in a better mood. If you can't do it that way, use Control Panel>Device Manager and uninstall the network adapter for the LAN.
All that said, if you're trying to connect wirelessly, the LAN message is irrelevant and the reason you can't connect to your local router may be that you're using the wrong security key. Are you sure every room has its own router?