Hi to all
dear , first you must sure that there is awireless connection between pc2 and the router ....
by using steps below :-
1- use wireless adapter like D-link or so that in pc2 or if it is found reinstall it with its CD
2-at pc2 let ip (TCP/IP) property be at DHCP
3- you have not put MAC at router
4- reset ( push thr back button of th router then take off the power
5-restart both pc2 and router
http://tell me .......