I have 2 Acer Aspire One netbooks, running Windows XP, Service Pack 3. AVG Free virus protection.
1.6 GHz, Intel Atom chip. 0.98 GB. I have been able to link both of these Acers tol different secure wireless networks through Cbeyond and ATT & T. I can also connect to any unsecured network I try. However, neither of the Acers is able to use Comcast at my house or at a friend's house. (Yes, I know the passwords). These Acers show an active connection in the icon in the lower right-hand tray, but they cannot find a server, regardless of whether I use Mozilla or Explorer. I have been able to use several other brands of laptop with these same Comcast home networks. So the problem is associated with the Acer-Comcast matchup. I assume it is a modem, router, or NIC problem. The modem is Actiontec and the router is Netgear (at my house, where I am now. I do not know the modem or router at my friend's house). The network adapters are Aetheros (wireless) and Realtek (wired). I cannot connect the Acer through the wall either. I apologize if this is actually a software rather than a hardware problem.