Hi prem i have a same problem u need the internet connection sharing setting lets do this
first you need a bluetooth dongle and a network switch install the bluetooth drivers in your one system not both bluetooth dongle is why because a bluetooth dongle has enable with a another network card (install on your laptop) or other hand you can install a additional lan card in your desktop connect both the system to network switch with ethernet cable now create a broadband connection if your creat is done type ur id & pw but select the option anyone use this computer option now go to broadband connection icon property goto advance u have see the option internet connection sharing but wait if u have install a network card or bluetooth dongle u have seen a dioleg box in a droap down manu chose local area connection 2 & click ok now go to local area connection 1 property u have divide ur system as a sarver and client in sarver local area connection property select ip/tcp option and fill the ip 192.168.0.1 and subnet 255.255.255.0 defoult gateway blank click ok then goto client local area connection property ip/tcp option and fill the ip 192.168.0.2 subnet 255.255.255.0 defult gatwey 192.168.0.1 and dns sarver 192.168.0.1 click ok and now connect ur broadband with ur sarver dont client when the sarver is browse the client was also brows using sarver ip ................ thank
having fun