Many install a firewall and can't control it. You didn't mention it so here's the usual list of networking help sites.
Here is the weird thing:
i have a D-LINK MODEL DL-624 router, connected to my dsl modem ok i have both computers connected to the router(BOTH are Dell) plus also a printer to the router , ok both computers connect to the internet no problem, both computers can print to the printer , ok i ran the network setup wizard in other to create a network enviroment where i can browse each computer c drive, of course i ran the network wizard in both computers, i also shared both computers c drive and i added users account from each computer into the other and so on with administration rights, ok the computer running win xp home can search for the win xp pro and i can see the hardrive of this computer and the share documents too but the win xp pro when i clicked on search computers from the start menu it shows me the othe computer name but when i double clicked to browse this computer " i got the message that i don't have permisions to access that computer and say see administrator, access denied", well i setup the network wizard on both, the sharing and security is Enable on both, I defined users from one computer to the other one on both, can you please advise me whatelse can i check for, to solve the problem of one computer don't access the other one ?
note: both computers have spk 2 and the workgroup is the same in fact is named MSHOME, both computers have different compute name too.
Thanks a lot