Linking my computers?

hi all.....im trying to link my pc and my laptop together on my wireless home network... im running a dell xp2 pc and a sony vista laptop on a belkin 54g router and belkin adapters... when i try to look for coms on my net im told none are there but when my mates bring their laps round i can see them all and can share info with no probs....nice 1.....ps please keep it as simple as poss coz im not to bright when talking computers and as a afterthought how can i update all my drivers