Under Network connections, select your local LAN then goto properties by rightclicking mouse, tick advance tab then put a check to internet connection sharing para ishare nya yung net sa wifi adafter.
Nawala net sa desktop mo?settings lang yan malamang,prperties ng lan1 mo gawin mo automatic ip at dns.nakikigamit lang usb adapter sa lan1.subukan mo wala yung usb adapter kung may net desktop mo. basta shared net siya.