Vista - i need help - my home network

i have a two desktop computer and i want to share both computer harddrive how do i do? i have already speed good time figuring out and no luck and i'm using AVG software for my AntiVirus

I'm using VISTA 32 bit OS

i have computerA and computerB, i want computerA to see computerB and vice versa.

i have a wireless router

computerA is hooked through the dsl cable wire (directly)
comupterB is a wireless connected

if i clicked:
Control Panel\Network and Internet\Network and Sharing Center\View full map than i can see my computerA and computerB and when i try to click on compuerB (from computerA) than nothing happens.

i have the same name (WORKGROUP) on both computers

also the below services automatically started.

--SSDP Discovery
--TCP/IP NetBIOS Helper
--Computer Browser
--Server

what else is going on ?

thanks.

so were assuming you have filesharing/public folder sharing/media sharing switched on via network and sharing center?

and you have configured your firewall to a "networked" computer too?

You still wont be able to access the entire hard drive though you do realise that too , just the public stuff , although i think you can alter this through the permissions settings of the folders themselves

>>>you have filesharing/public folder sharing/media sharing switched on via network >>>and sharing center?

yes

>>and you have configured your firewall to a "networked" computer too?

how do i do that?